Answer:
Mainframe Computer is capable of doing all the functions which are listed in question.
Explanation:
A mainframe is a very large general-purpose computer (usually costing millions of dollars) that is capable of performing very many simultaneous functions, supporting very many simultaneous users, and storing huge amounts of data. A microcomputer is the type of computer you use.
Answer:
a. releasing hormones
Explanation:
The hypothalamus controls the anterior pituitary by means of corticotropin-releasing hormone (CRH). The hormone CRH is encoded by the CRH gene on eighth human chromosome. The anterior pituitary in turn regulates other endocrine glands by means of Adrenocorticotrophic Hormone (ACTH). These actions form part of the Hypothalamic–pituitary–adrenal(HPA) axis which is one of the important neuroendocrine systems in humans.
Many admins set their firewalls to drop echo-request packets to prevent their networks from being mapped via "Ping Sweeps".
A remote possibility is that there's too many hops between the source and target and the packet's TTL expires.
I personally feel that e-mail can be used for more business settings and as a more formal approach to things as opposed to a text, but option C seems to be more of an opinion. I would go with C or D.