ExplanationIf Jeff watches one movie, he has four different choices for that one movie, so choice (A) is a correct answer. To find the total number of arrangements of two movies, first write out two slots.

For the first movie, he has 4 choices and a 4 goes in the first slot. For the second movie, he now has three choices and a 3 goes in the second slot. 4 × 3 = 12, so choice (E) is correct.

There are 24 arrangements if he watches three movies: 4 × 3 × 2 = 24. Choice (E) is also correct.

Hence options A, E, and F are correct!
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Sandy

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