I was stuck between A and E, choose E after watching the video I realized my mistake.

However, I'm still overall confused on this question, can someone explain it better/how they understood this question overall?

#feedback

#help

I got this right but I also want to get better at negating.

I got the right answer by asking what is necessary not by negating.

can someone negate the answer choices and specifically B showing how effective the right answer shows when negating.

#feedback

#help

Its confusing that he relies so much on past lessons and refers to them often because I'm sure I'm not the only one who wanted to start with necessary assumption before sufficient and because in the lessons sufficient came first he keeps referring to it and its really throwing me off.

#feedback