Given What You Know About Pollination and Fertilization in Pines

Given what you know about pollination and fertilization in pines, what is a reasonable hypothesis for both the survival of pollen and the growth of the pollen tube inside the ovule?

A) There is a substantial transfer of signals and nutrients between male and female gametophytes.
B) The male gametophyte and pollen tube are nutritionally independent of both the female sporophyte and female gametophyte.
C) There is a substantial transfer of signals and nutrients between the male gametophyte and female sporophyte.
D) There is a substantial transfer of signals and nutrients between the male sporophyte and female sporophyte.