Your office branch has been assigned the network address of 10.10.0.0/16 by the Corporate HQ. Presently your network addressing scheme has these addresses split into eight networks as shown below:

1: 10.10.0.0/19
2: 10.10.32.0/19
3: 10.10.64.0/19
4: 10.10.96.0/19
5: 10.10.128.0/19
6: 10.10.160.0/19
7: 10.10.192.0/19
8: 10.10.224.0/19
You need to take the currently unused block of network 10.10.160.0/19 and further divide it into eight networks for use by a satellite branch that is being designed on the fourth floor of your building. What will the new subnet mask be for these new networks?

A.
255.255.252.0

B.
255.255.0.0

C.
255.248.0.0

D.
255.255.240.0

E.
255.255.255.0