Rereading. Or looking up unknown words.
It really depends on Charlie's co worker and the outcome will be on Charlie's personality
I believe the answer is the third option "Because outside research adds scholarship to my own opinion." Hope this helps. (ノ◕ヮ◕)ノ*:・゚✧
1- Why is she “Sad”?
Because “reading a sad history “
2-why are they happy?
Because winning
3-why is she tired?
Because climbing