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I NEED HELP PLZ!!!!!!

How many things do controlled experiments attempt to test at one time?

A. 1
B. 0
C. 2
D. 3

2 Answers

3 votes

Answer:

2variables are tested at one time

User Morrison Cole
by
8.6k points
3 votes

Answer:

lol

Step-by-step explanation:

User Quercus
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