C, be-caused. semi -colons and commas.
Answer:

Explanation:
9 x 9 x 9 x 9 is 9 multiplied by itself four times, so it's 9 to the 4th power as typed above.
I would say 'A' Incredulous.
Hope i helped!
Answer:
I love autumn; its my favorite season.
Explanation:
Seems correct there are no misspelled words..