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.
Historical fiction<span> is closely related to </span>realistic fiction<span> in that the past needs to be plausibly if not accurately represented, especially if the story is not only set in a</span>historical<span> period but the characters and events within that story have analogs within the actual </span>historical<span> record.</span>
Honestly letter D makes more sense, i would go with that