Transfer of a risk to another party is part of which of the following risk response categories? A. Mitigation B. Acceptance C. Avoidance D. Analysis

It is pat of Mitigation process.

This is we called as "Mitigation" transferring the risk from one party to another party.

A - Mitigation.  

Transferring the risk to another part is the Mitigation process, one of the actions that are part of risk management. However very common we understand risk with something negative for the project, the risk can be positive.

To transfer the risk is part of Mitigation