<span>C. Is the correct answer here - bought is based on the root verb 'buy or to buy' but its sense in the sentence is set against the framework of a time from the phrase with the word 'During' and so the word of choice must become 'bought'.</span>
If your choices are the following:
A. Ivan Ilyich's has a dreaded fall that eventually leads to his illness.
B. Ivan Ilyich's colleagues react to finding out about his death and reminisce about his life.
C. Ivan Ilyich carries on a successful professional life and a deteriorating family life, when the onset of his illness occurs.
D. Ivan Ilyich lives out his full life story, from a young boy to a public prosecutor to a member of the Court of Justice.
Then the answer is c.
I don’t what your trying to say but be more specific pls