Materials are able to move across a cell membrane through one of two methods: active transport or passive transport. What is the difference between the two? A
Active transport requires the cell to form vesicles, while passive transport requires the use of membrane pumps.

B
Active transport requires the cell to expend energy, while passive transport does not.

C
Active transport is the only form of transport that requires the use of protein carriers.

D
Passive transport is the only form of transport that requires the use of protein carriers.