You Have Identified Two Different Mutations That Inactivate the Same

You have identified two different mutations that inactivate the same gene. One is a point mutation (a single nucleotide substitution) , and the other is a deletion. Which of the following statements is TRUE?

A) The deletion will have a more severe effect than the point mutation.
B) The point mutation can be reversed by another point mutation, but the deletion cannot.
C) If the point mutation is heterozygous, the deletion is likely to be homozygous.
D) The deletion, but not the point mutation, will be visible through a light microscope.