Question

what is the only birth control method that prevents both pregnancy and stis?
iuds
condoms (internal or external)
nexplanon implants
birth control pills

Explanation:

IUDs, Nexplanon implants, and birth control pills only prevent pregnancy by altering reproductive hormones or blocking implantation, but do not create a barrier against sexually transmitted infection (STI) pathogens. Condoms (internal or external) create a physical barrier that blocks both sperm (preventing pregnancy) and STI-causing pathogens from passing between partners.

Answer:

B. Condoms (internal or external)