B. Bottlenose dolphins DO NOT use echolocation to find out 1) how far the object is. 2) how big the object is. 3) where the object is. 4) how to get to the object.

The text says: "Echolocation tells the dolphins a lot of things about the object, such as the shape, size, speed, distance, and location of the object." This means echolocation helps them determine how far, how big, and where the object is.

Therefore, the answer is 4) how to get to the object.