I believe the answer is A., though it's been a while since I read the story.
Answer:
"Today's medical students owe a debt to Dr. Henry Gray"
Explanation:
An independent clause is a part of a sentence that can stand alone and still be a complete sentence. A complete sentence has a subject and a verb.
In the problem, the independent clause is "Today's medical students owe a debt to Dr. Henry Gray". This is because we can take this section of the sentence out of the original and it can still make sense by itself since it has the subject ("students") and the verb ("owe").
The other part of the sentence is a dependent clause because it cannot stand alone: while it does have a verb "is", it does not have a main subject to go with that verb.
Hope this helps!
The answer is C :) you need a comma
First, I will ask her again if she understood what I said because there may be a language barrier between us. She may have misunderstood, which is why she held her hand out expecting money. If she says she understood what I was asking, I will ask her how much money she wants for the photo and base my final decision on that.