What is the most crucial piece of developing a disaster recovery plan?

What is the most crucial piece of developing a disaster recovery plan?

A.
Business impact analysis

B.
Implementation, testing, and following through

C.
Participation from each and every department

D.
Management support

Explanation:
Management�s support is the first thing to be obtained before putting
any real effort into developing these plans. Without management�s support the effort
will not receive the necessary attention, resource, funds, or enforcement.