What Best Explains the Chromosome Number of the Resulting Cell

Multiple Choice

What best explains the chromosome number of the resulting cell if a cell that had completed only meiosis I were fertilized by a normal sperm?

A) Both cells would be haploid, so the chromosome number of the resulting cell would be diploid.
B) This would be a diploid cell being fertilized by a haploid cell, so the chromosome number would be triploid.
C) At fertilization the sister chromatids in the sperm would separate, so the number would be triploid.
D) Both cells would be haploid, so the resulting cell would also be haploid.