Upon Exposure to Blue Light,plants Not Only Begin to Grow

Upon exposure to blue light,plants not only begin to grow toward the light,but move their chloroplasts to the sunny side of each cell.Why would it be advantageous to move chloroplasts within cells?

A) to maximize light absorption by the chloroplasts for photosynthesis
B) to increase production of phototropic hormones
C) to maximize heat absorption by the chloroplasts for cellular respiration
D) to increase ATP production during the light-independent reactions
E) all of the above