Why is a clause for requiring source code escrow in an application vendor agreement important?

A.
To segregate systems development and live environments

B.
To protect the organization from copyright disputes

C.
To ensure that sufficient code is available when needed

D.
To ensure that the source code remains available even if the application vendor goes out of
business

Explanation:
A clause for requiring source code escrow in an application vendor agreement is
important to ensure that the source code remains available even if the application vendor goes out
of business.