In This Question, Assume That the Life Cycle of a Flowering

In this question, assume that the life cycle of a flowering plant begins with the germination of a seed and ends with the development of a fruit. Two events that occur in the life cycle are the germination of a pollen grain and the formation of a generative nucleus.

A) The germination of a pollen grain precedes the formation of a generative nucleus.
B) The formation of a generative nucleus precedes the germination of a pollen grain.
C) Both events occur more or less simultaneously.