Which sentence uses correct end punctuation for a question?

Which sentence uses correct end punctuation for a question?

• A. Is the dog friendly today?
• B. Is the dog friendly today.
• C. Is the dog friendly today!
• D. The dog friendly today?

Answer: (A)

End punctuation for questions uses a question mark. A proper yes/no question in present tense with “to be” in front uses inversion: Is + the dog + friendly today? and ends with a question mark, signaling that you’re asking something. So the sentence correctly asks about the dog’s friendliness today by starting with “Is,” placing the subject after the verb, and finishing with a question mark, which makes it a clear, proper question. The other options don’t fit: one ends with a period, turning it into a statement; another ends with an exclamation point, which conveys strong emotion rather than a straightforward question; the last has a question mark but isn’t formed as a proper yes/no question, so it sounds incomplete rather than grammatically correct.

End punctuation for questions uses a question mark. A proper yes/no question in present tense with “to be” in front uses inversion: Is + the dog + friendly today? and ends with a question mark, signaling that you’re asking something.

So the sentence correctly asks about the dog’s friendliness today by starting with “Is,” placing the subject after the verb, and finishing with a question mark, which makes it a clear, proper question.

The other options don’t fit: one ends with a period, turning it into a statement; another ends with an exclamation point, which conveys strong emotion rather than a straightforward question; the last has a question mark but isn’t formed as a proper yes/no question, so it sounds incomplete rather than grammatically correct.