Read the following paragraph.

Some schools are adopting year-round schedules, but I believe that long summer vacations are beneficial and necessary. First of all, many students need to work during the summer. Without several months to devote to full-time work, teens will be cheated of income and work experience. Additionally, some students need to re-take courses in summer school. If there is no time to catch up, those students will fall further behind. Finally, teachers deserve an extended break from school. They might need to take classes themselves, to stay up to date in their subject matter. Without a summer break, teachers don’t have a chance to do this. In conclusion, there are important reasons to keep long summer vacations.

What part of an argument is it missing?
A: Counter argument
B: Evidence
C: Claim
D: Analysis