WILL MARK BRAINLIEST!

A researcher 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?

A. She will need to allow mold to grow for more days on the white bread, since it contains more preservatives, to measure the dependent variable.

B. She will need to limit the dependent variable to white bread or wheat bread.

C. She will need to allow mold to grow for fewer days on the white bread, since it contains more preservatives, to measure the dependent variable.

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

Recently, crops of vegetables such as lettuce and green onions have been contaminated, while they are still on the farm, with bacteria that cause food poisoning. how will science influence the way the government responds to prevent an increase in food-borne diseases? because science has shown that lettuce and green onions are not nutritionally valuable, the government may pass laws that ban the sale of lettuce and green onions. because science has shown that there is no way to prevent bacterial contamination, the government may pass laws that punish businesses that buy lettuce and green onions. because science has shown that the washing of hands prevent the spread of infectious diseases among people, the government may pass laws that require hand washing by everyone who handles food. because science has shown there are ways to find the source of the contamination, the government may pass laws that require farm practices that reduce the contamination of lettuce and green onions.