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Answer: b. two hundred million years ago.
Continental drift is a scientific theory was developed by Alfred Wegener (1880-1930). He was a German meteorologist, who proposed the hypothesis that continents were the part of huge landmass or supercontinent about 200 million years ago. These continents got separated or splitted from their parent continent and drifted to other locations. He named the parent or supercontinent as "Pangaea" (which means "all lands" in Greek) which began to break up.
The hypothesis of continental drift is used to explain an event that happened
a. two million years ago.
b. two hundred million years ago.
c. two billion years ago.
d. two hundred billion years ago.
The answer is (b) Two hundred million years ago