Which of the following demonstrates correct punctuation?

The correct answer demonstrates proper punctuation by effectively using semicolons to separate complex items in a list. In this case, each city and its corresponding state are treated as a single unit, which is vital when those units contain commas themselves.

For example, in the correct sentence, "New York, New York," "Providence, RI," "Savannah, Georgia," and "New Orleans, Louisiana" are all distinct destinations. The use of semicolons to separate these parts clarifies the sentence structure, ensuring that readers easily recognize where one location ends and another begins. This helps prevent confusion that could arise if commas alone were used, especially since some of the items already have commas within them.

Moreover, the correct answer appropriately includes a dash before "and back," indicating an added element to the sentence that emphasizes the return aspect of the trip. This type of punctuation aids in creating a smooth, clear flow of information.

In contrast, other choices lack either the necessary semicolons or misplace commas, leading to confusion or ungrammatical constructions. The use of punctuation in writing is essential for clarity and comprehension, and this correct answer exemplifies that principle effectively.