Which sentence requires semicolons instead of commas?

Question

On our summer road trip, we will travel to Pennsylvania, Maryland, and Delaware.

This summer, we are going on a road trip to Philadelphia, Pennsylvania, Baltimore, Maryland, and Rehoboth beach, Delaware

On our summer road trip, we will travel by car train, and bus to three different states.

This summer we are going on a road trip to the cities of Philadelphia, Baltimore, and Rehoboth Beach.

Answer 1

The sentence that requires semicolons instead of commas is:

"This summer, we are going on a road trip to Philadelphia, Pennsylvania, Baltimore, Maryland, and Rehoboth Beach, Delaware."

In this sentence, the cities and states are paired together, which can lead to confusion. Using semicolons would clarify the separation of these pairs:

"This summer, we are going on a road trip to Philadelphia, Pennsylvania; Baltimore, Maryland; and Rehoboth Beach, Delaware."