To raise the standard of education, it is necessary

The correct answer is C. To revise curriculum.

A curriculum is a set of courses and programs that are offered by a school or university. It is important to revise the curriculum regularly to ensure that it is up-to-date and relevant to the needs of students. A revised curriculum can help to raise the standard of education by providing students with a more challenging and engaging learning experience.

Option A is incorrect because evaluating students continuously does not necessarily lead to a higher standard of education. In fact, if students are constantly being evaluated, they may become stressed and anxious, which can negatively impact their learning.

Option B is incorrect because giving high salaries to teachers does not guarantee that