Use the character description and scene except to answer the question.

Character Description:
Casey is a lighthearted character who likes to joke around. In this scene, she is telling her mother there is a mouse in the house.
Scene Excerpt:
"Mom, I'm pretty sure we have a mouse," Casey said.
"We thought so last month, and it turned out to be the cats getting into the cabinets," her mom said. "Why do you think it's a mouse this time?"
Based on the character description, which piece of dialogue would best help develop the character for readers?

A. "Lots of reasons. There were nibbled food boxes, the scratching sounds in the wall—oh!" Casey grinned. "And I saw a mouse in the kitchen this morning."

B. "I saw it myself," Casey said. "Plus, it's been tearing things up in the kitchen and making sounds in the wall."

C. "At first, I wasn't sure," Casey admitted. "The torn food box could have been the cat again. But I heard sounds in the wall, and then I saw the actual mouse in the kitchen this morning."

D. "I know I like to joke around a lot, but I'm not joking this time," Casey said. "I saw the mouse myself, and it's been eating things and running around in the walls."