Weaken, which one is correct?

H.al1997

General Michaels rejects the use of outdated weaponry. All other generals do not reject the use of outdated weaponry. Therefore, General Michaels is the best war strategist.

Weaken:

A) Rejecting the use of outdated weaponry is not a factor in being a good war strategist.
Rejecting the use of outdated weaponry is not sufficient to be a good war strategist.

Cant Get Right

If it's not a factor at all, then there is no argument left. Just because it isn't sufficient doesn't do much. Maybe it's necessary. If it's a necessary condition for being the best war strategist and Michaels is the only one who satisfies that condition, then that's a really good start to making this argument. We don't need sufficiency, but we do need relevancy. By denying relevancy, answer choice A doesn't just weaken this argument, it destroys it.

TheMikey

Literally was about to say what CGR said. I'm going with A because if it's not a factor at all, then why would you conclude that he is the best?