Which type of narrator would an author use if he or she wanted to limit the perspective of the story to only one character

Messalla frowns at the wide circular cover, for a moment returning to his own fussy world.

What is the narrators main conflict in this passage

Select the correct answer. which headline do you think is most likely to be effective? a. if you want to stay healthy, take xyz for breakfast, lunch, and dinner b. stay fit, stay healthy with xyz c. health and fitness d. xyz is the magic solution for your entire family to stay fit and healthy e. xyz is your solution for all health and fitness problems