Application of Skills Directions

Multiple Choice

Application of Skills Directions:
Apply the knowledge you have gained from Chapter 23 to answer the following questions.
Which of the following sentences uses comma rules correctly?

A) Truthfully, I don't know if a vegetarian diet is better than a regular diet.
B) Truthfully, I don't know, if a vegetarian diet is better than a regular diet.
C) Truthfully I don't know if a vegetarian diet is better, than a regular diet.
D) Truthfully I don't know, if a vegetarian diet, is better than a regular diet.