Charles darwin theorized that evolution must occur slowly, over long periods of time. this is a(n) theory.

a.) catastrophist

b.) creationist

c.) gradualist

d.) punctuated

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.