Hola amigo!
The correct answer would be; D. Jeb couldn't wait for his favorite time of year-summer
Explanation:
A - The J in jeb isn't capitalized and summer isn't sectioned off right.
B - (of year summer) shouldn't be in parenthesis.
C - "Jen couldn't wait-" shouldn't be like that.
Hope this helps.
Adios amigo. c: