Marta is infected with a sexually transmitted disease. diagnosis reveals that she is infected with the which causes cervical cancer.

Marta is infected with a sexually transmitted disease. Diagnosis reveals that she is infected with the  HPV ( Human PapillomaVirus) which causes cervical cancer. HPV is the name for a group of viruses that affect the human body. There are more than 100 types of HPV, of which at least 13 are cancer-causing (also known as high risk type).Cervical cancer is by far the most common HPV-related disease.

c would be the answer

chemical preservatives