I believe B. Is the correct choice. When using the word " Oh" in a sentence, it usually contains a comma before another statement.
Answer:
ur answer is correct. because it is referring to the same word it technically clues that the answer you have chosen let's the reader know the meaning
it is a phrase becuase a phrase is a group of words that may contain either a subject or a verb but not both and the sentence "swimming laps at the pool" only contians a subject becuase, who is swimming laps at the pool?
C or d both are good but I am leaning towards c