You have configured an OSPF stub area. What does adding the no-summaries command do?

A.
It blocks summaries out of the stub area, and blocks summaries coming in from the backbone.

B.
It allows summaries out of the stub area, but blocks summaries coming in from the backbone.

C.
It allows summaries out of the stub area, and allows summaries coming in from the backbone.

D.
It blocks summaries out of the stub area, and allows summaries coming in from the backbone.