Choose the best answer to each of the following.
A block of wood with a flat rock tied to its top floats in a bucket of water. If the wood and rock are turned over so the rock is submerged beneath the wood, the water level at the side of the bucket
(a) rises.
(b) falls.
(c) remains the same.
(d) But with the rock beneath the wood, both rock and wood sink.
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