Recall that leaves form in distinct arrangements (whorled, opposite, or alternate) on the stems of vascular plants. How might chemical factors cause new leaves to form in these particular patterns?

A)Leaf primordia drain auxin from neighboring cells, with new primordia forming where auxin in the meristem surface is at the highest concentration.
B)Leaf primordia secrete chemical activators that promote the formation of leaves nearby.
C)Mature leaves secrete chemical inhibitors that prevent the formation of leaves nearby.
D)Mature leaves secrete chemical activators that promote the formation of leaves nearby.