Most students in the class scored less than 70% on the exam. This means that the exam was too difficult to accurately assess student learning. Therefore, as exams are supposed to accurately assess student learning, the exam must be revised and readministered.

Which statement is the conclusion of the above argument?

- The exam must be revised and readministered.
- Some students in the class scored higher than 70% on the exam.
- Exams are supposed to accurately assess student learning.
- Most students in the class scored less than 70% on the exam.