Which pronoun to fill in the black?

their

Explanation:

It and our makes no sense if you put it in the blank. It wouldn't make grammatical sense and will sound childish.

for this case, we must find the number of deaths per day of the year 2015, in automobile accidents, knowing that 32,400 people died.

knowing that the year 2015 had 365 days we have the following division:

where "x" represents the number of deaths per day.

rounding off we have:

approximately, 89 people per day died in 2015

answer:

89 people per day

i believe the answer is d