What is the most appropriate summarization for these routes?

What is the most appropriate summarization for these routes?

A.
10.0.0.0 /21

B.
10.0.0.0 /22

C.
10.0.0.0 /23

D.
10.0.0.0 /24

Explanation:
The 10.0.0.0/22 subnet mask will include the 10.0.0.0, 10.0.1.0, 10.0.2.0, and 10.0.3.0 networks,
and only those four networks.