【正确答案】 C

【答案解析】原文：W: Sometimes doing regular activities in a slightly different way can help to re-activate old memory pathways in our brain, or even build new ones!M: Oh, yeah. I’ ve heard that exposure to new sights, sounds, and smells can help stimulate the brain.W: Right. So you could even put some herbs and spices next to your bed so you wake up to different smells each morning.Q: What does the woman say about doing regular activities in a slightly different way?题目问的是克里斯蒂娜获得硕士学位后将做什么。对话中克里斯蒂娜提到获得硕士学位后，她想回国并申请在外交部工作。故答案为C。