Reference:https://docs.splunk.com/Documentation/Splunk/8.0.4/SearchReference/Timechart

Data model acceleration is a feature that speeds up searches on data models by creating and storing summaries
of the data model datasets1. To enable data model acceleration, you must have administrative permissions or
the accelerate_datamodel capability1. Therefore, option D is correct. Accelerated data models cannot be edited
unless you disable the acceleration first1. Therefore, option B is correct. Private data models cannot be
accelerated because they are not visible to other users1. Therefore, option C is correct. Root events can be
accelerated as long as they are not based on a search string1. Therefore, option A is incorrect.

Reference:https://docs.splunk.com/Documentation/CIM/4.15.0/User/Overview
The Common Information Model (CIM) is a methodology for normalizing data from different sources and
making it easier to analyze and report on it3. The CIM defines a common set of fields and tags for various
domains such as Alerts, Email, Database, Network Traffic, Web and more3. One of the statements that
describe the CIM is that it is a methodology for normalizing data, which means that it provides a standard way
to name and structure data from different sources so that they can be compared and correlated3. Therefore,
option A is correct. Another statement that describes the CIM is that it can correlate data from different
sources, which means that it enables you to run searches and reports across data from different sources that
share common fields and tags3. Therefore, option B is correct. Another statement that describes the CIM is
that the Knowledge Manager uses the CIM tocreate knowledge objects, which means that the person who is
responsible for creating and managing knowledge objects such as data models, field aliases, tags and event
types can use the CIM as a guide to make their knowledge objects consistent and compatible with other apps
and add-ons3. Therefore, option C is correct. Option D is incorrect because it does not describe the CIM but
rather one of its components.