Which of the following occurs by active transport A)transport of Na+ from region of higher concentration through a region of lower concentration through a channel B) simple didfussion of a steroid...

Which of the following occurs by active transport

A)transport of Na+ from region of higher concentration through a region of lower concentration through a channel

B) simple didfussion of a steroid hormone through the plasma memebrane

C) Faciltated diffusion of Cl- down it's concentration gradient

D) Transport of K+ across the plasma memebrane using cellular ATP