Answer:
No, it's not safe
Explanation:
Smartphones emits high levels of radiation which can mess up your sleep. It can also cause difunction or unbalance to your biological clock (which is a group of cells in the hypothalamus that respond to light and dark signals). It could also blow up on your face.
To protect their shins from getting hit
I think the answer is proactive
The answer to your first question is D. Three months. The reason why is it takes at least 3 months to have detectible HIV antibodies. In rare cases, it may take up to 6-12 months.
The second question I'm not 100% positive on but I believe the answer would be B.
Most bacteria prefer neutral pH (6.5-7.5 )