Answer: “Tony cooked dinner and I made the salad, but Mike just ate.”
NOTE: The third option is 100% incorrect, but from the other two, it is quite confusing. Option 1 applies more to a compound sentence, but it can be Option 2 as well, because it makes sense too.
Timothy (walks) to school everyday, and he lives four miles away.
C his smile could charm anyone
D. We collected shells because we wanted to use them to make a necklace.
