What is the 10-20-30 rule for slideshows from Guy Kawasaki of Apple?

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A.Slideshows last no more than 10 minutes; should contain no more than 20 slides; and use a font size of no less than 30 point.

B.Slideshows should use a font size of no less than 10 point; contain no more than 20 slides; and last no more than 30 minutes.

C.Slideshows should contain no more than 10 slides; use a font size of no less than 20 point; and last no more than 30 minutes.

D.Slideshows should contain no more than 10 slides; last no more than 20 minutes; and use a font size of no less than 30 point.

参考答案:

答案：Slideshows should contain no more than 10 slides; last no more than 20 minutes; and use a font size of no less than 30 point.