It's even more important these days that your computer be protected by a firewall. There are criminal elements lurking in the shadows of cyberspace who send out probes to detect unprotected PCs. Once a vulnerable computer is found, these criminals install software that assists them in committing identity theft and fencing stolen IDs. They also defraud online advertisers by using these zombie computers to visit pay-per-click ads a. Argument, conclusion: Once a vulnerable computer ... fencing stolen IDs.
b. Nonargument.
c. Argument; conclusion: They also defraud... to visit pay-per-click ads.
d. Argument;

d). Argument; conclusion: It's even more important ... protected by a firewall.

Explanation:

In the given excerpt, the argument and the conclusion that the author deduces is 'the increased importance of safeguarding your PCs with a firewall.' The argument is logically supported by the proper evidence in order to show the probable threats associated with keeping your computers unprotected('identity theft, fencing stolen Ids, defraud, etc). These factual descriptions substantiate the author's claim and justify his deduction that it is a must to keep your computers safe using a firewall in order to prevent these crimes. Thus, option d is the correct answer.

the first settlements began along the huang river because of the importance of the huang river in the beginning of china. it goes back to the story, “the tale of emperor yu”, which references the tale of the great flood, which was caused by the huang river and was believed to create and influence china’s making.

the answer is "meiosis ii in the mother".

the procedure of meiosis includes two divisions of the hereditary material. the main division is known as the decrease division – or meiosis i – on the grounds that it lessens the quantity of chromosomes from 46 chromosomes or 2n to 23 chromosomes or (n depicts a solitary chromosome set). in people, the decrease division results in two sperm cells each with 23 chromosomes or an egg cell with 23 chromosomes and one disposed of polar body. the second division – or meiosis ii – is called equational division. the two sperm cells split again creating four sperm cells, each with 23 or n chromosomes. in oogenesis, the egg cell and polar body partition to shape the ovum and two extra polar bodies. along these lines, the posterity are guaranteed to get one portion of the chromosomes from the mother and one half from the dad.