Will give brainliest to whoevers right. Worth 25 points!!! Which of these sentences could be added to the end of the third paragraph (sentences 18-21) to support the ideas in that paragraph?

A. Even on the federal level, it is rare for civil servants to receive time off let alone three entire months for a summer break.

B. This kind of program will also allow teachers to better prepare for curriculum and not have to rush through important concepts and ideas.

C. The summer break not only helps students to do better in schools, it ultimately helps the economy as travel increases during the summer.

D. In the real world, most people only receive a limited number of days for vacation as well as a set number of sick days and personal time-off days.

This is the paragraph:

(1) As students and teachers, we should both feel lucky to enjoy not only a summer break, but in some cases, a winter break as well. (2) In the working world, summer breaks are a welcomed oasis to a normal working schedule, but they never happen. (3) School is supposed to prepare students for what the "real world" will be like. (4) Why then do most schools still implement the antiquated policy of summer vacation? (5) As students and teachers, don't we also make up the "real world"? (6) The real world works like this: people don't get summers off like they do in school, so summers in school are disingenuous because it does not reflect the "real world" like year-round schools.

(7) For many working citizens, a summer break is a novel idea, but it is impractical. (8) Consider what would happen to a city government that decided to take the summer off. (9) Garbage would pile up. (10) Police stations would close. (11) Fire stations would be empty. (12) Now, imagine doing without one of the many services the city provides for almost three months. (13) The entire city would riot. (14) Yet, aren't public servants also a part of the "real world"? (15) Why don't they get summers off as well? (16) Preparing students for the real world while giving them summers off does not prepare them for the real world. (17) It gives them a false sense of what the real world will be.

(18) Year-round schooling, however, is a more accurate representation of what the true real world is. (19) In a year-round school program, students would go to school Monday through Friday for four months at a time. (20) Students would also get a week's vacation at each quarter interval. (21) In the end, this would better prepare students for what the real world is truly like.