Notice that the only two factors that changed during the experiment are the variables listed in the lesson question, shown below: What is the effect of the genes of the parental mice on the fur color of the offspring mice?

The traits of the offspring are the variable. Genes of parents are the variable.

explanation:

with the profits from the european sales, merchants purchased europe's manufactured  goods, including tools and weapons. then the merchants shipped those manufactured  goods, along with the  american  sugar and rum, to west africa where they were bartered for  slaves.

it should be d or b but i'm sure it's d

portugal is the westernmost country in europe.