63.

Answer and Explanation

Your Answer is

Correct Answer is D

Explanation

D is correct, because a colon can connect two complete sentences, and the latter sentence is an explanation of the previous sentence.

There is no punctuation between such as and the following noun, and A is excluded.

For example as parenthesis should be followed by to use (teach sb to do sth), exclude B.

Before and after the semicolon must be a complete sentence, excluding C.