what is the subnet address?

Given an IP address of 192.168.1.42 255.255.255.248, what is the subnet address?

A.
192.168.1.8/29

B.
192.168.1.32/27

C.
192.168.1.40/29

D.
192.168.1.16/28

E.
192.168.1.48/29