Respuesta :
I think it’s A. Manipulate the independent variable, because dependant variables react to the changes of independent variables.
A scientist must manipulate the independent variable in order to examine the dependent variable.
What is independent variable?
The term "independent variable" means exactly what it says. It's a stand-alone variable that isn't affected by the other variables you're trying to track.
A person's age, for example, could be an independent variable. Other aspects, such as what they eat, how much kids go to school, and how much television they watch, will have no effect on their age.
In reality, when you're looking for a link between variables, you're looking to determine if the independent variable influences the other variables or dependent variables.
Thus, we can conclude that option A is correct.
You can learn more about independent variable here:
https://brainly.com/question/82796
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