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