The stem of a plant is experiencing phototropism. Which statement correctly describes the plant’s response?

a
The stem moves toward the light for better photosynthesis.
b
The stem grows upward because larger cells are growing.
c
The stem moves away from the light for better photosynthesis.
d
The stem bends to the sides because there are smaller cells on sides.

A. The stem moves toward the light for better photosynthesis.