Answer the following question given this paragraph: 

Chlamydia is the most common STI in the United States. As shown in the graph in Figure below , females are much more likely than males to develop chlamydia. Like most STIs, rates of chlamydia are highest in teens and young adults.


Q: Which  is the most common sti (sexually transmitted infection) in the united states?

 Choices:

- AIDS

- giardia

- syphilis

- chlamydia

A:
chlamydia
