I think its A but it could be C
The sentence that is best as it is is option B: Only Dave will go with us; the others are busy. The rest of the sentences contain incorrect parts such as the proper use of the word "only". In the first sentence, it should be "only to watch". In the third sentence, it should be "only drinks water". In the third sentence, it should be "Only Leah studied".
I think the best choice would be C.
A President may be impeached for, Treason, Bribery, and/or high Crimes and Misdemeanors.
Hope that helped :)
Answer:
The answer would be: Our dog howls often at nights
Explanation:
The other ones don’t make sense.
Our dog howling often at nights.
Our dog howled often at nights.
Our dog was howling often at nights.