Which of these best states the main idea of this passage?

"did you know that the roller skate has been around since the early 1700s? people who loved winter ice-skating wanted to go "dry-landing skating" in the summer, and so they attached wheels to their boots. the early models were hard to roll, though. in the late 1800s, roller-skate design improved. once the skates were easier to handle, the sport became more popular."

a. people liked ice-skating in the winter
b. many people wanted to skate in the summer.
c. roller-skating has become a popular sport over time
d. early roller skates were difficult to use.

which is the right answer?

me ; -;

Of all the attributes essential to a respected man or woman or to a respected nation, the predominant characteristic is self-discipline. laws cannot be made compelling people to suppress their desire for power or position. no method of legislating such wisdom exists. as free people, we must face a choice between two types of discipline. one is the self-discipline that is still open to us—the kind that free people and free nations exercise when they select the executives, lawmakers, and judges who will govern them and assure their protection and well-being. the second is a cold-blooded, ill-intentioned, form of discipline that may be thrust upon us by strangers—the discipline of force, terrorism, suspicion, and intimidation—the discipline used in totalitarian regimes.does every sentence following the first in some way support the theme?

Read this sentence. although the idea was foreign to me, i still thought i would give it a try.

Which arrow is closest to caddo river