Suppose That 100 Pollen Grains Land on a Stigma, and 50

Suppose that 100 pollen grains land on a stigma, and 50 mature seeds are formed in the fruit. What does this indicate about the pollination process and success?

A) 50% success: 50 sperm fertilized 50 eggs, and 50 sperm fused with 50 polar nuclei
B) 50% success: evidently, only 50 sperm pollinated 50 anthers
C) 50% success: 100 pollen grains grew to 50 ovules, and double fertilization occurred
D) 50% success: 50 sperm fertilized 50 eggs, and 50 sperm fused with 100 polar nuclei