Question

8. Why did Ofelia and Marcus keep everything the same for the plants except for the type of fertilizers?
a. They didn't know how to make an experiment.
b. They included many different independent variables.
c. They used constants/controlled varjables so only the independent variable was different.
d. They included many different dependent variables.

Answer 1

Answer:

b. They included many different dependent variables.

Explanation:

Changing something that does not matter is called  a dependent variable.

also to me at least that's the only one that makes sense  

Answer 2

The answer is b. They included many different independent variables