Well, it tells you that thoughts (which express theme) and emotions (which express mood) are closely connected, so d. theme and mood are closely linked.
By quoting your evidence and looking back at your notes or text also by using your supporting details... <span />
C the attitude of the writer
The nineteenth century author who wrote novels that explored themes of the frontier wilderness is James Fenimore Cooper. His works shows the American essentials; that it was timeless just like the wilderness. His depiction of American character is on point and he was considered as the first American who depicted it correctly.
D is correct
A is wrong because is should be are
B is wrong because does should be do
C is wrong because has should be have