Rees put gravel, sand, and clay in a bottle. She added some water, shook the bottle, and left it for an hour. What did she see after an hour. A) sand settled at the bottom and Clay settled at the top.B) Clay settled at the bottom and sand settled at the top. C) Gravel settled at the bottom and clay settled at the top. D) Clay settled at the bottom and gravy settled at the top.