Leon listed the steps involved when auxin affects plant growth in response to light. The steps are listed in random order. 1 - Auxin builds up in the stem.
2 - The stem bends toward light.
3 - Auxin moves to the shaded side of plant.
4 - Cells on the shaded side grow more quickly.

Which shows the correct order of steps involved when auxin affects plant growth?

1, 4, 2, 3
4, 3, 2, 1
3, 1, 4, 2
2, 3, 1, 4