The line plot represents data collected from a used bookstore.

A horizontal line labeled Cost in Dollars starts at 1 with tick marks every one unit up to 8. There are two dots above 2 and 6. There are three dots above 3 and 5. There are four dots above 4. The graph is titled Cost of Used Books.

Which of the following describes the spread and distribution of the data represented?

The data is almost symmetric, with a range of 9. This might happen because the bookstore offers a sale price for all books over $6.
The data is skewed, with a range of 9. This might happen because the bookstore gives away a free tote bag when you buy a book over $7.
The data is bimodal, with a range of 4. This might happen because the bookstore sells most books for either $3 or $6.
The data is symmetric, with a range of 4. This might happen because the most popular price of a book at this store is $4.