[1] Students should complete a reasonable amount of homework every night. [2]
Homework can help students succeed in school. [3] A 2012 study by Helen Cobalt, an
educational researcher, showed that doing homework improved students'
understanding of skills and helped them get better grades. [4] One of a school's goals
is educating students, and the fact that homework helps students learn means it is an
important part of school. [5] Some people may argue that homework keeps students
from spending time with loved ones or other hobbies; however, studying and
practicing skills from homework can bring students and loved ones together, as well
as encourage students to develop new interests. [6] If you think student learning is
important, you'll agree that homework is worthwhile, too.

In which of these sentences does the author state her claim?
A. 1
B. 2
C. 3