The mountains of Colorado ____ my next vacation destination.

A: be
B: are
C: am
D: is

B: are

The correct answer is D: is.

The correct answer is B: are.

To determine the correct answer, we need to understand the subject-verb agreement in the sentence. In this case, the subject is "mountains of Colorado." Since "mountains" is plural, the correct verb form should be plural as well. Therefore, we use the verb "are" to match the plural subject.

If you are unsure about subject-verb agreement, here is a step-by-step approach to solving similar questions:

1. Identify the subject of the sentence. In this case, the subject is "mountains of Colorado."
2. Determine whether the subject is singular or plural. In this case, "mountains" is plural.
3. Choose the verb form that matches the subject. For plural subjects, we use the verb "are."
4. Select the correct answer based on the chosen verb form. In this case, the correct answer is B: are.