Particles too large to enter the membrane need to use a transport-channel proteins, no energy is required and they move from high to low concetration. A-Ion Pump
B-Facilitated Diffusion
C-Simple Diffusion
D-Osmosis
and it is not C because that’s what i picked

B

Explanation:

Facilitated diffusion because the transport channel proteins facilitate(help) the particle to enter the cell

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try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)