Answer:
True
Explanation:
True, the commas act like parentheses. So we could say "His doctor could not identify the problem."
As for the periods, capitalization, and layout, it is all correct.
Has Andrea forgotten her umbrella?
Answer:
as a result, because anything else you put wont make sense
Answer is B. She is the person whom he had found sleeping in the library.
A. That author is the one who I saw at the bookstore today.
A would have been correct if it had the word 'whom' instead of who.
B. She is the person whom he had found sleeping in the library.
Its the correct option.
C. Against who did you think you would compete in the contest?
This word 'whom' is supposed to be used here in the place of who to make it correct.
D. The musical group whom won the top prize are from my hometown.
The use of the word 'whom' here makes the sentence incorrect.