Why are preventative controls generally preferred to detective controls?

In preparing for an audit of the footwear division of a major retail organization, an internal auditor gathered the following information about the organization's stores:

In addition to labor costs, the other costs associated with each store are leasing and maintenance expenses. Which of the following is a valid conclusion?

An internal auditor is reviewing employee travel data to identify opportunities to cut costs while ensuring adequate participation at conferences to support the organization's mission. Which of the following pieces of evidence would be sufficient for completing this task?

What is the best course of action when the internal audit activity does not have the knowledge necessary to perform a planned audit of the organization's new IT data backup process?

Which of the following activities aligns with The IIA's Core Principles for the Professional Practice of Internal Auditing?