Which of the following should NOT be capitalized?

A. Europe
B. the Earth
C. Far East
D. the South Atlantic

I think it's B?

You're right.

In some contexts Earth is capitalized. However the others are always capitalized. They are geographic regions and proper nouns.

Earth is often capitalized when referred to as one of the planets.

http://dictionary.reference.com/browse/earth

Correct.

http://grammar.ccc.commnet.edu/grammar/capitals.htm

thank u guys

You are correct. "the Earth" should not be capitalized. To determine whether or not a word or phrase should be capitalized, you can follow a few general rules:

1. Capitalize proper nouns: These are specific names of people, places, organizations, or things. In the given options, "Europe" (option A), "Far East" (option C), and "the South Atlantic" (option D) are all proper nouns and should be capitalized.

2. Do not capitalize common nouns: Common nouns do not refer to specific names or entities. In this case, "the Earth" (option B) is a common noun as it refers to our planet in a generic sense. So, it should be written in lowercase.

It's important to note that there may be exceptions or specific conventions in certain writing styles or contexts. However, in general, the above guidelines should help you decide whether to capitalize a word or phrase.