Questions 161~163 refer to the following online advertisement.

If you need to share your ideas clearly and engage the interest of an audience, our editable PowerPoint templates can save your precious time. We fully recognize the need to effectively convey ideas and information in your presentations, so we offer a huge selection of templates whose colors, fonts, or layout can be customized and with these highly customizable template slides, you will be able to impress your audience.

Hurry up! Spend two hundred dollars for lifetime access to the Unlimited plan. Sign up with the Unlimited plan to download as many templates as you need and enjoy fresh biweekly content, or get started with the Free plan to access dozens of templates that will blow the socks off your audience.
【題組】161.What does this ad sell?
(A) A tutorial on how to persuade people.
(B) A web design service.
(C) An online course in presentation skills.
(D) Material for a talk giving information about something.