I'll give you a question, please answer with step-by-step reasoning process.
What do you want to prevent after you get an injury?\nOptions:\n- for it to become worse\n- become infected\n- hurts\n- cause bleeding\n- cause death

become infected
Become infected is the process of infecting or the state of being infected.

You want to prevent to become infected after you get an injury.

.

So, the answer is become infected