Aresearcher finds that white bread contains more preservatives and has a higher moisture content than wheat bread. she designs a test to determine whether the type of bread, white or wheat, affects the amount of mold growth. what must be done for the researcher to accurately measure the dependent variable?

An independent variable is the one which can be changed in an experimental setup and the effect of the change can be observed on the changes of dependent variable. A dependent variable depends on independent variable. The dependent variable in this case is the growth of mold on the bread. The independent variable is the type of bread and moisture content.The effect of change of independent variable can be observed on the growth of molds which is a dependent variable. The researcher should use a quantitative approach to accurately measure the dependent variable.

The answer is D.

She will need to learn how to quantitatively measure mold growth to measure the dependent variable.

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