Answer:
Correct answer is D. Roman Catholicism.
Explanation:
Most of people in Canada are Christians, but D is correct because almost 40 percent of Canadians are Roman Catholic.
There are almost 25 percent of Protestants, while when it comes to Islam and Buddhism, they together are making around 5 percent of population.
That is why all other answers are wrong.
Reason why Catholicism is widespread in Canada is because Canada was in hands of France until 1763.
IT'S C OR D !
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