Question

How many variables should there be in a well-designed experiment:

A) As few as possible
B) Exactly one
C) Two or more
D) No specific limit

Answer 1

In a well-designed experiment, there should be two or more variables.

Step-by-step explanation:

In a well-designed experiment, there should be two or more variables (C). Having only one variable (B) would not allow for a comparison to be made, and having as few variables as possible (A) may not provide enough information for a meaningful analysis. Having two or more variables allows for the examination of relationships and interactions between different factors.