Determining the optimal case assignment load, determining what factors are needed to solve crimes, and reducing the number of crimes assigned for investigations that cannot be solved are all ways to increase: a. investigative productivity.
b. an officer’s workload.
c. partnership with the community.
d. data collection.

a. investigative productivity.

Explanation:

According to my research on crime investigations, I can say that based on the information provided within the question these are all ways of increasing investigative productivity. This is because all these tasks reduce the workload of the officer's, and provide all the necessities for the officer's to solve cases at an increased rate, therefore increasing productivity.

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