(You don't have to answer I just want to see who gets this right. Here is you're riddle) I see everything but I have no eyes. I float in the sky but there is a possibility you won't see me. What am I?

You are the clouds

Explanation:

Clouds float in the sky and can see everything without eyes. There are some clouds you arent able to see

Clouds

the answer is clouds because they have no eyes they float in the sky and we most likely wont see them unless we look and even then it wont be the same way it was before

answer; i believe the correct answer is (a) all trenches must have access/egress;

system programmer option d is correct

because an operating system is software that manages computer hardware and system resources.