Answer: Getting older means getting closer to the end of your life which means that they try to spend more time with the people they want to and pursue thing that they always wanted to do.
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Explanation:
The answer is D. If doctor was on its own you wouldn't capitalize it, but because it is next to his name you would capitalize the title; doctor.
The word that the adverb would modify is an adjective. So what's the adjective in the sentence?