What is the recommended size for a Development Team?

The correct answer is D, because the recommended size for a Development Team is 3 to 9 members.

The Scrum Guide states that “fewer than three Development Team members decrease interaction

and results in smaller productivity gains. Smaller Development Teams may encounter skill constraints

during the Sprint, causing the Development Team to be unable to deliver a potentially releasable

Increment. Having more than nine members requires too much coordination. Large Development

Teams generate too much complexity for an empirical process to be useful.”