Which of the following is an example of a STD?
A.
Arthritis
B.
Cancer
C.
Chlamydia
D.
Diabetes

C) chlamydia

Explanation:

Chlamydia is caused by bacteria. It is one of the most common sexually transmitted diseases.

relationship between pressure and air volume and led to the understanding of how respiration works; i believe this is the correct answer ; /// good luck

i think it's the first one because doctors aren't the ones who get rid of the old needles. most of them time it's not even doctors who give you shots, it's nurses.