Why did the accepted scientific theory of the solar system change from a geocentric model with Earth in the center to a heliocentric model with the Sun in the center? Question 2 options:

A: Because over time the Sun's position changed

B: Because over time the Earth's position changed

C: New evidence and observations changed our understanding of the solar system

D: New planets formed in between the Sun and Earth

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