For this question, the correct answer is c. D is incorrect because the program has to be represent by integer.

For a and operator to be true, both has to be true.

It needs to be repeat until the end for the program to be true.

For this question, the rate is only constant from 1 to 5 year.

For this question, I mis calculate the answer

For this question, a central monitor can't be used on a large scale.

For this question, ipv4 allows more device to be connected to the internet