20 POINTS

The first time Holly ate tamales, she was coming down with a stomach bug. She was very ill soon after eating the tamales. For years after, just the smell of tamales would make Holly feel nauseous, and she could not eat them.

Why could Holly not eat tamales?

A.

because she associated tamales with being sick

B.

because she does not like the way tamales taste

C.

because she is allergic to tamales

D.

because tamales made her sick the first time she ate them

Ascientist is investigating the effects of salinity on fish development. he places fertilized fish eggs in an aquarium that contains low salinity and observes their development. what factor would improve experimental design the most? place the fish eggs in the open ocean because that is the natural habitat include another aquarium that has normal salinity to compare to the low salinity aquarium include an aquarium that replaces salt with sugar to confirm that the effects are specific to salt grow algae with the fish eggs in order to provide adequate nutrients to the developing embryos