C$.$ Determine whether each of the following passages contains an argument, an explanation, or neither an argument nor an explanation. If it contains an argument, identify the premises and the conclusion. If it contains an explanation, identify the explanans and explanandum.

We should decrease class sizes in our elementary schools. Students do better when classes are smaller.

He's getting fat and it's easy to see why. He never exercises, he has donuts for breakfast every morning, and hamburgers for dinner every night.

The drop in his grades wasn't caused by the divorce of his parents, because that occurred before he was two. There must be some other cause of the problem.

$*4.$ You can see from the deformation of the right foot that it was broken and healed very badly. This dinosaur could barely walk. That's why she died.

Thirty$-$seven times sixty$-$four is $2,428.$

"Help!"

"You might be surprised to learn that when you turn your car, your front wheels are not pointing in the same direction. For a car to turn smoothly, each wheel must follow a different circle. Since the inside wheel is following a circle with a smaller radius, it is actually making a tighter turn than the outside wheel." $($

Howstuffworks.com $2007)$

$*8.$ "The Cherokees believed that they had a sacred duty to avenge the deaths of fallen comrades, and so war parties formed quickly following a death." $($Perdue $2005,3)$

"Stocks fell yesterday, led by financial services stocks, on concerns that the economy's expansion will erode $[$due to$]$ troubles in the mortgage industry." $($New York Times, "Financial Shares Lead Market Lower," $2007,$ C$13)$

The following passage comes from a nineteenth century decision of the U$.$S$.$ Supreme Court. The case involved a dispute in which the state of Georgia sought to impose its laws on the Cherokee tribe.

$"$If it be true that the Cherokee nation has rights, this is not the tribunal in which those rights are to be asserted. If it be true that wrongs have been inflicted, and that still greater are to be apprehended, this is not the tribunal which can redress the past or prevent the future." $($Cherokee Nation $1831,20)$

Why don't humans have fur? Because fur is a great place to be a bug. Fur helps keep an warm but it is also a breeding ground for ticks, lice, and other parasites. Think