Genes are located in the same location on homologous chromosomes.
The ends of a chromosome are called telomeres. They prevent chromosomes from joining together when they are not supposed to.
A: That answer is illogical at best
B: It makes sense, the smaller you are, the less food you need
C: This would need extensive studying of key deer ancestry to figure out
D: This could work over thousands of years. But an overpopulation of one wouldn't push out the other. Ungulates (hooved mammals) of different species often work together.
B, sounds like your best choice.
The highest power objective because you will see the specimen perfectly
I think the it may be the liver