Question

Scientists often use controlled experiments to answer questions. Choose the three correct statements about controlled experiments. (PLEASE INCLUDE THREE ANSWERS)

A) No changes are made to a test group in an experiment.

B) A control group is used for comparison to other groups. Eliminate

C) Only one change can be made per test group in an experiment.

D) Changes can only be made to the control group in an experiment.

E) A controlled experiment must have a control group and test group(s).

If anyone could help with this that would be amazing!

Answer 1

Actually it was that is worked but only for 10 days

Step-by-step explanation:

I took the science unit test

Answer 2

Ima go with E I'm still taking the test...

Step-by-step explanation:

if not E its B but E is the only one that makes sense...