Answer:
B) Release candidate
Step-by-step explanation:
The release candidate is the last stage or final stage of software testing by vendors before it can be officially released to be sold commercially. The release candidate is usually carried out by a very large community of customers.
Some vendors may have to bring out just more than one release candidate if problems are discovered in the first RC.
Release candidate generally feature complete and supposedly bug free, and ready for use by the community.