Actually, changing the MTU (C) often makes things worse, not better, unless every hop supports the larger size. If either end or a device in between can't handle it, you'll see more fragmentation and packet loss. Seen similar trick questions on network exams. Pretty sure C is the least likely to help here-unless both sides specifically allow higher MTUs, which isn’t stated.
Yeah, C is the one that won't really help. Increasing MTU without ensuring both sides match just increases the chance for packet fragmentation, especially over VPNs where path MTU discovery isn't always reliable. A and B actually tackle performance and prioritization, D is a bigger investment but improves stability. Unless I'm missing something, C is least likely to solve the issue here. Agree?
