Here is the passage again:

While Kristy labored through another evening of incomprehensible accounting homework, her roommate Bob read a sci-fi novel. And ate an entire bag of potato chips.

You chose to use Punctuation Rule 8 to fix the problem:

Main Clause + Ø + Lonely Verb Fragment.

The correction looks like this:

While Kristy labored through another evening of incomprehensible accounting homework, her roommate Bob read a sci-fi novel and ate an entire bag of potato chips.

Great job! You deserve those cyber chips!

Go to the next sentence.

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