The correct answer is C. Man.
Rh factor is a protein found on the surface of red blood cells. It is inherited from parents and can be either positive or negative. About 85% of people have the Rh factor, while 15% do not.
The Rh factor is important because it can cause problems during pregnancy and childbirth. If a woman who is Rh-negative is pregnant with a baby who is Rh-positive, the mother’s body may produce antibodies that attack the baby’s red blood cells. This can lead to a condition called hemolytic disease of the newborn, which can be serious or even fatal.
There are a number of tests that can be done to determine a person’s Rh factor. These tests are usually done as part of a routine blood test.
If you are Rh-negative and you are planning to become pregnant, it is important to talk to your doctor about the risks of hemolytic disease of the newborn. Your doctor can help you to understand the risks and to make decisions about how to manage your pregnancy.
The other options are incorrect because they are not human beings.