Which of the following is the world's largest roman catholic country?

a. italy
b. brazil
c. canada
d. the united states of america

The answer should be Brazil.Most of the figures are taken from the CIA Factbook or PEW Research Center Surveys. According to the CIA Factbook and the Pew Research Center, the five countries with the largest number of Catholics are, in decreasing order of population, Brazil, Mexico, the Philippines, the United States, and Italy.
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Brazil. Option B is best

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