Final answer:
The sentence which is punctuated correctly is option d. This year, the most popular class is film studies.
Step-by-step explanation:
The sentence which is punctuated correctly is option d. This year, the most popular class is film studies.
Correct punctuation includes the use of capitalization, punctuation marks such as periods and question marks, and the correct placement of commas. In this sentence, all these elements are used correctly.
Option a is incorrect because it is missing an exclamation mark at the end of the sentence. Option b is incorrect because it uses a question mark instead of a period at the end of the sentence. Option c is incorrect because it should end with a question mark instead of a period.