Which router command will configure an interface with the IP address 10.10.80.1/19?

Which router command will configure an interface with the IP address 10.10.80.1/19?

A.
router(config-if)# ip address 10.10.80.1/19

B.
router(config-if)# ip address 10.10.80.1 255.255.0.0

C.
router(config-if)# ip address 10.10.80.1 255.255.255.0

D.
router(config-if)# ip address 10.10.80.1 255.255.224.0

E.
router(config-if)# ip address 10.10.80.1 255.255.240.0

F.
router(config-if)# ip address 10.10.80.1 255.255.255.240

Explanation:
255.255.224 equal /19 in CIDR format hence the answer