I don't see any options, but it would most likely be the one that is most caring and understanding.
Ways society can be affected by stds or stis are sexual contact, and the mixing of bodily fluids such as blood, spit (in some stds or stis), sweat (only in some stds or stis), urine, etc.
I would say it is most likely skills or information. It can be broadly interpreted in it's contest. It mostly likely co-insides with your required reading terms. I encourage you to use your best judgement.
