Based on the exhibits, what could be the cause of this issue?

Refer to the exhibit.

Exhibit 1.

Exhibit 2.

PC1 cannot reach PC2.

Based on the exhibits, what could be the cause of this issue?
A . PC1 has the wrong IP address for its default gateway setting.
B . Router A has a direct route, instead of a static route, to 10.1.10.0/24.
C . The next hop address for the 10.1.20.0/24 route is incorrect.
D . Router A has an invalid subnet mask for the VLAN 1 subnet.

Answer: A