M: Ah, that's the forth ad that appears suddenly on my computer screen since I started working on my paper. ,F: You can buy an app that will stop those ads. ,M: I can't afford to buy some fancy $10 software just so I can write my paper. ,F: It's not that expensive. It's $1 per month.
(A) M: I agree with you. It is not expensive if the app cost $1 monthly. (B) M: I’m sorry, I don’t understand. Could you say it again? (C) M: It is really expensive to buy an app on my phone which cost $12 monthly. (D) M: I have finished my paper, so I don't need to buy the app which need $30 monthly.
A