Refer to the exhibit, you determine that Computer A cannot ping Computer Which reason for the problem is most likely true?

If Computer A's subnet mask is incorrect, it might miscalculate its own network address or the network address of Computer B, leading it to believe B is on a different subnet or unreachable, even if they are logically on the same segment.

An incorrect default gateway would prevent Computer A from reaching devices on *other* subnets, but it typically would not prevent pinging a device on its *local* subnet.

While Computer B's subnet mask being incorrect could also cause issues, the question asks for the *most likely* reason, and an incorrect mask on the initiating computer A would prevent it from correctly addressing the local target.

An incorrect default gateway on Computer B would affect its ability to respond to or initiate traffic with devices outside its subnet, but not necessarily its ability to respond to a ping from a device on its own local subnet.