An independent variable is a variable that 's (blank) changed in an experiment

“The independent (or manipulated) variable is something that the experimenter purposely changes or varies over the course of the investigation. The dependent (or responding) variable is the one that is observed and likely changes in response to the independent variable”

For more information go to: https://www.mansfieldct.org/Schools/MMS/staff/hand/Variables.htm

The correct answer is c

Ithink its false. hope this : )