The correct answer is B: Imperative.
1. Blackjack
2. Erik's grades are slipping
3. Arthur
4. True
5. Erik and Arthur
6. Castor
7. He's been expelled
Last month, I hiked to the peak of a mountain. Next month, my best friend and her sister are going to visit that site too. It's a difficult trip, but it's worth it. They're going to have so much fun there! I hope I can go back again soon.