The Program Manager just received approval of his proposed acquisition strategy with one exception: he has been directed to make maximum use of existing Air Force software. Which ofthe best software acquisition practices is most applicable to his situation?

a. Use system based software design
b. Inspect requirements and design
c. Assess reuse risks and cost
d. Use metrics to manage

According to the scenario, the program manager has been directed to use existing software whose one of the main aspects to check is the risk included in reusing the software.

Assessing the cost of reusing the software is also one of the main aspects to check.

Hence the most appropriate answer is option (C).

while other options are not that appropriate because it is directed to use the existing software that means the design and metrics are already given with the existing software.