A federal request for assistance (RFA) should be evaluated on the basis of six variables. Which variable relates to the impact on DOD's ability to perform its primary mission?

Readiness (effect on the DOD's ability to perform its primary national defense mission)  

Explanation:

In responding to a Request For Assistance (RFA), the DOD renders Defense Support of Civil Authorities (DSCA)

The DSCA is rendered whenever there is full commitment from local to Federal resources, including tribal and state or when the situation is in the domain of only the DOD. As a requirement, the provision of DSCA is based on reimbursement of the DOD.

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.