No, he can say that's your opinion, but that is a weak ethical argument, he needs to say why he disagrees, and what are his view points on his reasoning, like why does he believe what he believes, just as person A does.
Erm.... when you are officially accepted into the college.
The answer is "they may experience empty nest syndrome".
Empty nest syndrome refers to a feeling of grief and dejection guardians may feel when their kids leave home out of the blue, for example, to live without anyone else or to go to a school or college. It's anything but a clinical condition.
The process of facilitated diffusions is how glucose enters most cells. There is a recognized limited number of glucose-transporting proteins. A process of glycosis known to the rapid breakdown of glucose in the cell is what helps maintain the concentration gradient.
Hope that helps :))