What is the Main Idea of the following paragraph (There are answer choices after it and it has to be one of them):

"In the north during the springtime, migrating birds return to the Arctic from southern areas. The longest journey is made by the incredible Arctic tern. This amazing bird is no larger than a crow, but its body surface is more streamlined. The tern is called the long-distance champion of the bird world, often traveling 23,000 miles a year between West Africa and the Arctic. Such migrations take weeks, with stops for food and rest.

Pick one:

A. Migrating Birds return to the Arctic.
B. The Amazing journey of the Arctic Tern.
C. The migration of all birds.
D. The North in springtime.

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