Read this passage from a news article.

[1] School districts across the country are considering a year-round school year schedule. [2] A 2017 study of middle schoolers across the state found that students forgot an average of three months’ worth of education over summer vacation. [3] Although year-round school is still a relatively unheard of concept, the idea is catching on in some districts. [4] Many students and families do not like the idea of giving up summer vacations, despite the lapse in learning.

Which sentence from the article would best support an argument supporting a year-round school year?

sentence 1
sentence 2
sentence 3
sentence 4