SAT English Practice Question

The most common types of books are hardbacks and paperbacks. Hardback books have a rigid cover, while paperbacks have a flexible cover. Paperbacks are typically cheaper and easier to carry than hardbacks. However, hardbacks are generally thought to be more durable and more likely to last longer. Hardback books also often include additional features, such as illustrations or special bindings. The two types of books are popular for different reasons, and each has its own set of advantages. Which choice provides the best way to combine the sentences at the beginning of the passage to create a clear and concise sentence?

1. A.The most common types of books are hardbacks, which have a rigid cover, and paperbacks, which have a flexible cover.
2. B.The most common types of books are hardbacks, that have a rigid cover, and paperbacks, that have a flexible cover.
3. C.The most common types of books are hardbacks having a rigid cover, and paperbacks having a flexible cover.
4. D.The most common types of books are hardbacks, they have a rigid cover, and paperbacks, they have a flexible cover.