The following question has two parts. First answer Part A and then answer Part B. Part A: Which word best defines economics as the author uses the word in paragraph 4 of Passage 2, “High schools will keep starting too early. Here’s why”?

That’s surprising because, from the outside, the economics of a later start-time
seem pretty good. A 2011 study from the Brookings Institution looked at three

ways school districts could improve just by getting better organized. Starting

school later for teens was number one.

“Among all the things schools could do to increase student performance, this is

one of the less expensive ones,” says Brian Jacob, an economics and public-policy

professor at the University of Michigan, one of the study’s co-authors. “This is not

like hiring extra teachers to reduce class size, or building a big new expensive

building.”

A) importance
B) reasons
C) price
D) factors