I have some science questions i need answered?

Question

1.) A group of students is trying to make different colors with different pigments. Which of the following would have the greatest impact on the color of the final product?

A. the volume of the pigments mixed together.

B. the size of the container used to mix the migments

C. the proportion of the different pigments used

D. the total amount of pigments used

2.) Sometimes people in the desert see what appears to be water this happens because_____________.

A. heated sand refracts light

B. the Sun transmits blue-light wavelengths?

C. light refracts through air of different densities

D. their eyes' cones and rods are heat-sensitive

thanks, hope you can help =]

Answer 1

1.C

(A and D only determine the volume of the result. B is irrelevant)

2.C

(A is wrong. B is irrelevant and no humans could do D)