i got the question right, but am a bit confused as to how the third sentence is the conclusion. I identified it as the sub-conclusion and the second sentence as the main conclusion

I chose E over D because I thought that for D it even stating that it benefits consumers at all is in a way kind of strengthening the argument rather than weakening. Had the stimulus mentioned metrics specifically D may have been correct, but since that's not mentioned in the stimulus, I was able to rule it out entirely.

For the second question I put /assassinated instead of assassination fails. Can someone explain when to put a negation symbol on something and when not to.