Condoms offer full protection against sexually transmitted infections.
Dive into untested waters with the hands fully extended over the head.
Numbers 1 and 2 are correct.
Rationale: Unintentional injuries are the leading cause of death for teenagers. Wearing seatbelts, even on short trips, and using approved helmets when bike riding can help prevent injuries. One hour after the last drink of alcohol is not a safe window for driving, especially when multiple drinks have been consumed. Condoms are not 100 percent effective against sexually transmitted infections, even when used correctly. Abstinence is the only method guaranteed to avoid sexually transmitted infections. Never dive into untested waters, even with the arms over the head to “break” the fall. If the bottom of a body of water is not visible, it should not be considered safe for diving.