Can someone plzz help me! The Case of the Missing Muffins

"I have no idea what you're talking about!" Marina insisted. In fact, she seemed a little offended at the implication that she had misplaced the muffins they had made earlier.
Sharon felt compelled to apologize and said, "I'm sorry, Marina, I'm just upset because I signed up to provide snacks this week, and I don't have enough time to bake yet another batch of muffins for our study group. We have to find these because they couldn't have disappeared into thin air!"
"We'll find them, Sharon," Marina replied. "There has to be a simple explanation. No matter what, though, our group will have a wonderful study session."
"I know. Thanks, Marina." And with that, Sharon and Marina went to solve the mystery of the missing muffins.

From which point of view is this passage written?
A.
first person
B.
third person
C.
The point of view switches between third person and first person.
D.
second person