Question

5. What is the correct punctuation for the following sentence? This morning Tanner asked

Brittany if he could borrow her stapler
a.
This morning Tanner asked Brittany, if he could borrow her stapler?
b. This morning Tanner asked Brittany, if he could borrow her stapler.
c. This morning Tanner asked, Brittany if he could borrow her stapler?
This morning, Tanner asked Brittany if he could borrow her stapler.
d.

Answer 1

The answer should be the last one. This morning, Tanner asked Brittany if he could borrow her stapler.

The reason is that the commas separate out the introductory phrase "this morning" to form the correct sentence structure.