After conducting STP analysis for her custom auto parts store and developing strategies for each of the four Ps, Monique now has to make decisions

Resource allocation

Explanation:  

Resource allocation is one of the process that helps in distributing the various types of resources in the market and the main principle of the resource allocation is to making the correct decision while allocating the resource on the basis of their capabilities.

According to the given question, Monique is now making resource allocation decision after analyzing all the parts in the store and developing the various types of strategies by using the segmentation, targeting and positioning (STP) analysis.

Therefore, Resource allocation is the correct answer.  

b because thats the naswer i got