How does technology teach twenty-first century skills?

In vista and windows 7, the appearance and personalization option allows you to change the

Ingrid started speaking about her slide presentation. when she clicked to th"third slide, which had just a picture of an elephant, she forgot what she wassupposed to talk about. what could ingrid do to avoid this situation in thefuture? oa. print handouts for her audience.ob. add presenter's notes to each slide.oc. add a video to each slide.od. save her slide presentation to a flash drive

Can someone work out the answer as it comes up in one of my computer science exams and i don't understand the cryptovariables