Answer:
C.gametes is the correct answer.
Step-by-step explanation:
In the plant life cycle, meiosis produces haploid gametes.
Plant when they reproduce sexually, it produces haploid cells called as gametes by meiosis, that contains the half genetic information of parent.
The haploid gametes produces male and female gametes by mitosis and the fusion of male gametes and female gametes results in the formation of the diploid zygote, and it develops into the sporophyte.
As it reaches the maturity stage the diploid sporophyte by using meiosis produces spores.
Thus gametes is a correct answer.