Read the sentence from the article. Professor Rebecca Klaper was one of the leaders of the study. She and the other researchers were surprised how easy it was to find PPCPs.

The fact that the PPCPs were easy to find means that:

(A) There is a high amount of PPCPs in the water.
(B) Water levels at the Great Lakes are shrinking.
(C) The filtering system is not cleaning the water.
(D) People are dumping PPCPs close to the shore.