Answer:
Synthetic body part
Explanation:
A prosthetic is a synthetic body part that is used by people who are missing said body part. For example, someone who is missing an arm might have a prosthetic arm.
The last one is true. Somatic means it can be hereditary. Hereditary means that it is passed down from parent to offspring. So c cant be right because hereditary isn't an external factor. a isn't right because acquired mutations aren't hereditary you get them from external factors. B isn't right because its not the most fundamental way.
<span>Human immunodeficiency virus is spread by contact with bodily fluids. While most often transferred through sex or blood, it can not be spread simply by kissing another person unless you have a cut in your mouth.</span>