Question 1:
A. Note that inclusion of the marshmallows is optional.
B. To make a cup, remove one sachet of chocolate from the box.
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B is correct because it can connect with the sentence "In order to experience the best-tasting Bellagio hot chocolate, we recommend that you follow these simple instructions." 

C. It will not take long to create a delicious hot beverage.
D. Make sure you have these items ready before you begin.

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