Answer:
The correct answer would be option C.
Study of genes helps in understanding their functioning that is, how they control the traits, how they help in basic physiology of the body, how they are linked to diseases or disorders, and how the genetic disorders can be treated.
Leber Congenital Amaurosis is a genetic disorder which affects the functioning of the eyes.
Thus, gene location and functioning would help in understanding the causes of Leber Congenital Amaurosis disease and in developing the treatment for the same.