I honestly think it would be A.
The answer is 2. This is why their autosomal cells are referred to as diploid in chromosome number. The gametes have only one set of chromosomes. The homologous pair (sister chromosome) separate during meiosis I. If there was an extra chromosome in addition to this set then this would cause a condition called aneuploidy.
C) Heterozygous In a punnet square it will have a 100% chance of being heterozygous dominant.