Question

Which sentence uses a colon correctly?

Select one:
a. It can sometimes be difficult to tell lakes from rivers: both are generally made up of fresh water, and they often host the same species of fish.

b. It can sometimes be difficult to tell lakes from rivers, both are generally: made up of fresh water, and they often host the same species of fish.

c. It can sometimes be difficult: to tell lakes from rivers, both are generally made up of fresh water, and they often host the same species of fish.

d. It can sometimes be difficult to tell lakes from rivers, both are generally made up: of fresh water, and they often host the same species of fish.

Answer 1

The answer is a.. A colon is best used in advance of a new topic or point, and not in the midst of a sentence, as is the case with the other options.