formal logic is mainly focused if an argument is valid or invalid

informal logic is mainly focused on if a argument is weak or strong

So D is correct because it does nothing for the argument

I love the lesson wish there was more interactive quizzes but i do like the short answer to really get to see if you know it

I kept getting the context and premise confused

I chose E, but I highlighted the MC. Always go with your first mind.

So arguments are not equal and the more reasonable the argument the less it is subject to criticism the less reasonable an argument is the more it is subject to criticism.