Explanation
A multiple-zone system is a system that has one or more air handlers supplying conditioned air to more than one zone. A zone is a space or group of spaces within a building with heating and cooling requirements that are sufficiently similar so that desired conditions (e.g., temperature) can be maintained throughout using a single controlling device. The ventilation rate procedure calculations must be based on the multiple-zone system configuration because the HVAC system in the question serves different zones with different ventilation requirements.References: LEED v4 Reference Guide for Building Design and Construction, p.6881; ASHRAE Standard 62.1-2010, Section 6.2.52

Explanation
The correct answer is A, site conditions. According to the LEED v4: Building Design + Construction Guide, the Integrative Process Prerequisite, Integrative Project Planning and Design, requires the project team to perform a preliminary "simple box" energy modeling and analysis before the completion of schematic design.
The purpose of this analysis is to evaluate the energy performance goals of the project and to identify and compare the energy-related design strategies.The analysis should include the following aspects1:
* Site conditions, such as climate, solar orientation, shading, and natural ventilation potential
* Massing and orientation, such as building shape, size, and orientation, and how they affect the heating and cooling loads, daylight availability, and passive design strategies
* Basic envelope attributes, such as insulation levels, window-to-wall ratio, glazing properties, infiltration rates, and thermal bridging
* Lighting levels, such as the target illumination levels, daylighting potential, and lighting power density
* Plug and process loads, such as the equipment and appliances that consume electricity, and their schedules and controls
* Programmatic and operational parameters, such as the occupancy, operating hours, and zoning of the building
* Thermal comfort ranges, such as the acceptable temperature and humidity levels for the occupants
* HVAC system selection, such as the type, efficiency, and control of the heating, ventilation, and air conditioning system The other choices are not aspects that should be analyzed when pursuing an integrative design process focusing on energy-related systems, because:
* Potable water availability is related to the water efficiency and water quality goals of the project, not the energy performance goals2.
* Acoustic performance of the project is related to the indoor environmental quality and occupant comfort
* goals of the project, not the energy performance goals3.
* Applicability of green vehicles to the project is related to the location and transportation and greenhouse gas emissions goals of the project, not the energy performance goals4.
References: LEED v4: Building Design + Construction Guide, Integrative Process Prerequisite, Integrative Project Planning and Design, Option 1.Energy-Related Systems1; LEED v4: Building Design + Construction Guide, Water Efficiency Prerequisite, Indoor Water Use Reduction, Requirements2; LEED v4: Building Design + Construction Guide, Indoor Environmental Quality Prerequisite, Minimum Indoor Air Quality Performance, Requirements3; LEED v4: Building Design + Construction Guide, Location and Transportation Credit, Green Vehicles, Requirements4

Explanation
For major renovation and new construction projects, the required energy and water-related system analyses should be the same except for plug and process load needs. Plug and process loads are the electrical loads that are not related to lighting, heating, ventilation, and air conditioning (HVAC)systems, such as computers, appliances, equipment, and machinery. Plug and process load needs may vary depending on the type and function of the building, and they can have a significant impact on the energy performance and demand of the building. Therefore, the project team should analyze the plug and process load needs for each project and design strategies to reduce or optimize them. The other factors, such as site conditions, massing and orientation, and building envelope performance, are common to both major renovation and new construction projects, and they should be analyzed in the same way for both types of projects.
References:
*LEED v4 Reference Guide for Building Design and Construction, Integrative Process Credit: Integrative Process, page 811
*Integrative Process Worksheet2