Answer: B. Christianity
Explanation: According to official figures from a few years ago, Christianity is the religion with the greatest number of believers or 2.2 billion people, around 31 percent. Islam is in second place with 1.6 billion believers, or about 23 percent of the world's population. Buddhism is represented by about 7 percent or 521 million believers. Although Buddhism is not third in terms of representation in the world's population, it is ranked third in terms of options offered. Judaism is represented by about 14-15 million or 0.2 percent. There are other religious groups with a smaller or higher percentage of representation.