The muscle tone of the along the colon contracts it lengthwise, causing its walls to bulge and form pouches called

the national environmental policy act (nepa) is a united states environmental law that promotes the enhancement of the environment and established the president's council on environmental quality (ceq). the law was enacted on january 1, 1970. to date, more than 100 nations around the world have enacted national environmental policies modeled after nepa.

it is either c or d and i know for sure it is not a or b