I believe the best option to your question will be A.
I think it is increased risk of acquiring HIV,and increased risk of acquiring an STD
Answer: Well you could run and play at the park or in your backyard with your family, You could also ride bikes with them, Swim with them, And even hike with them.
Answer: Double blind clinical trial
Explanation:
The situation that is seen here is double blind clinical trail in which neither the participant nor the practitioner knows who is receiving the treatment.
This is used to prevent biasing in the experiment which is caused due to demand characteristics or placebo effect.
Here, in this situation the dog handlers and the experimental observer both were blinded to identify the breath sample.
