Identify Which Revision of the Following Sentence Has No Punctuation

Multiple Choice

Identify which revision of the following sentence has no punctuation or mechanics errors:
The student's who studied made excellent grades on their tests, the one's who did not study were not pleased with their scores.

A) The students who studied made excellent grades on their tests; the ones who did not study were not pleased with their scores.
B) The students, who studied, made excellent grades on their tests: the ones, who did not study, were not pleased with their scores.
C) The students (who studied) made excellent grades on their tests the ones (who did not study) were not pleased with their scores.
D) There are no errors.