Block X and Block Y Have the Same Mass

Multiple Choice

Block X and Block Y have the same mass. Both blocks are placed into a container of pure water. Block X ? oats in the water, and Block Y sinks to the bottom of the container. Which of the following statements is an accurate conclusion from this demonstration?

A) Block Y is heavier than Block X.
B) Block Y is less dense than Block X.
C) Block Y has a smaller volume than Block X.
D) Block Y would ?oat if more water were added.