The Principal’s advice will prove salutary for the students.

encouraging
remarkable
beneficial
harmful

The correct answer is C. beneficial.

Salutary means beneficial or helpful. In this context, the principal’s advice is likely to be beneficial to the students because it will help them to succeed in school and in life.

The other options are incorrect because they do not accurately describe the meaning of the word salutary. Encouraging means to give someone hope or confidence. Remarkable means unusual or extraordinary. Harmful means causing damage or injury.