Hello!
Your answer is A, 4 hours.
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To do this, first look at how fast Kayla is driving. She is driving at 53 mph, or 53 miles per hour. This means that every hour, she drives 53 miles.
She needs to drive 212 miles. Now, if she drives 53 miles every hour, then to get how long it would take her, divide 212 miles by 53 miles as that'll show how many hours of driving it'll take Kayla.
212/53 = 4 hours
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Therefore, it would take Kayla 4 hours to get to Boston.
Hope this helps!