Emergency Support Functions (ESFs): A. Must be used by local jurisdictions as their primary coordinating structure. B. May be selectively activated to support response activities. C. Are appropriate only for Stafford Act incidents. D. Are always activated in incidents requiring Federal support.

B. May be selectively activated to support response activities.

Explanation:

Emergency Support Functions -

It refers to the method of combining the governmental as well as some private sector capabilities to form a organization in order to provide some resources , supports and services , is referred to as the emergency support functions .

The method is used under major natural calamity , social issue , infrastructural development etc.  .

Hence , from the given scenario of the question ,

The correct answer is B.