PLEASE HURRY, I'LL GIVE YOU 25 POINTS!

A scientist found a correlation between honeybees and a certain species of flowering plant. When the bee population increases, so does the flowering plant population. And when the flowering plant population decreases so does the bee population. To find out whether each change in population CAUSED the other population to change, what could the scientist do?

A. Investigate the populations of two other species of plants and insects to see if they have a similar correlation.

B. Investigate the populations of the honeybee and plant species in areas where the other species is not present.

C. Have several other scientists examine the data to see if they see the same correlation.

D. Repeat the observations to see if the new data show the same correlation.