Q: Fact 1: Vesicle transport requires energy, so it is also a form of active transport. Fact 2: Much of protein transport in a cell occurs via coated transport vesicles. Given the two facts above, much of protein transport in a cell requires what?

OPTIONS:
(a). protons.
(b). recycling.
(c). oxygen.
(d). energy.
(e). atoms.
(f). Nutrients.
(g). walls.
(h). Energy..
A:
(d).