If Crayfish Are Raised in a Very Clean Aquarium That

If crayfish are raised in a very clean aquarium that only has iron filings in the floor,and they are allowed to go through several molts so that an iron filing is now serving as a statolith,what would be the effect of a large magnet suspended above the aquarium?

A) There would be no effect at all.
B) The crayfish would swim sideways.
C) The crayfish would swim upside down.
D) The crayfish would be unable to detect food.
E) The crayfish would be blind.

Correct Answer:

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