According to the passage, Charlotte Reed quit her job as a securities lawyer because _____

According to the passage, Charlotte Reed quit her job as a securities lawyer because _________.

A．she is tired of her work as a lawyer.

B．she likes pets more.

C．she thinks pet-sitting may be a more promising career.

D．she wants to have more free time.

请帮忙给出正确答案和分析，谢谢！