Which puncutation serves to set dialogue apart from the rest of the text in a narratritive

he sent troops to protect the students as they entered the school.

the right answer is the third one: turnpikes went short distances to connect markets. turnpikes, also known as toll roads, were very important for trade and transportation (of people, goods and products) in the 19th century, coinciding with the expansion towards the west. they contributed significantly to the economic development of the united states.