N this field of sunflowers, variation exists. Some flowers are tall, others short, and finally some plants are an intermediate height. The tallest plants shade the shorter; the taller plants are pollinated first. Over time, we might expect this field of sunflowers to be mostly tall. According to this scenario, identify the type of reproduction and list the processes that aid in variation.
A) Sexual: mitosis and random assortment of chromosomes; fertilization
B) Asexual reproduction: meiosis and crossing over; pollination and fertilization
C) Sexual: meiosis, crossing over, and random assortment of chromosomes; pollination
D) Asexual: mitosis; reduction division of chromosomes with random assortment; pollination