The answer for the question is B.
Katherine's opportunity cost of attending the lecture is: the transportation and time cost of getting to the lecture event itself plus the reduction in her physics exam grade by not studying tonight.
<u>Explanation</u>:
The opportunity cost is the "cost" lost by not enjoying the benefit associated with the chosen alternative choice. People usually make use of opportunities to make themselves better.
The opportunity cost can be explained as giving up of profit or value to achieve something else. Opportunity cost is the value of giving up the best thing whenever you make a decision. When Katherine decided to attend the lecture of her favorite author, she lost her time, transportation cost and even scored low grade in physics exam as didn’t study on exam night.
Answer:
Since the mid-20th century, dramatic change has taken place in gender relations in the United States, as illustrated by women's labor force participation rising from 32% in 1950 to 57% in 2018 and men's falling from 82% to 69% (U.S. Bureau of Labor Statistics, 2017, 2018b).
Answer: (B) Britain forced China to participate in the opium trade.
and (E) European nations set up competing spheres of influence in China.
Explanation: