All of the Following Involves Active Transport Across Membranes Except

All of the following involves active transport across membranes except

A) the movement of mineral nutrients from the apoplast to the symplast.
B) the movement of sugar from mesophyll cells into sieve-tube members in maize.
C) the movement of sugar from one sieve-tube member to the next.
D) K+ uptake by guard cells during stomatal opening.
E) the movement of mineral nutrients into cells of the root cortex.