Explanation
The correct answer is C: Asteraceae.
Ray-florets and disc-florets are characteristic features of the family Asteraceae, which is also known as the composite family or the daisy family. The ray-florets are the petal-like flowers at the edge of the flower head, while the disc-florets are the tubular flowers in the center of the flower head.
Brassicaceae, also known as the mustard family, is characterized by four-petal flowers and triangular-shaped seed pods.
Solanaceae, also known as the nightshade family, is characterized by flowers with five petals and an often-berry-like fruit.
Malvaceae, also known as the mallow family, is characterized by showy flowers with five petals that are often fused at the base, and fruit capsules that split open when ripe.
