Which statement best defines a relevant question?

a relevant question relates to the topic at hand.
a relevant question can be studied and investigated.
a relevant question is interesting, unusual, or unique.
a relevant question is connected to a particular goal.

A relevant question relates to the topic at hand.

the old way of life was represented by superstition, an angry god, and absolute submission to authority. the thinkers of the age of reason ushered in a new way of thinking. this new way championed the accomplishments of humankind. individuals did not have to accept despair. science and reason could bring happiness and progress. kings did not rule by divine right. they had an obligation to their subjects. europeans pondered the implications for nearly a century. americans put them into practice first.

answer; eliminate parking problems in cities, because a car took up only half as much space as a horse and buggy;