Final answer:
David's foot is 12 inches long and Jennifer's foot is 10 inches long. The ratio comparing Jennifer's foot size to David's (in inches) is 5/6 (option B). The correct option is B.
Step-by-step explanation:
To write a ratio comparing Jennifer's foot size to David's in inches, we need to convert their foot sizes to inches. David's foot is 1 foot long, and since there are 12 inches in 1 foot, his foot size in inches is 12 inches.
Jennifer's foot is 10 inches long. Now we can write the ratio comparing Jennifer's foot size to David's in inches as 10 inches : 12 inches.
To simplify the ratio, we can divide both numbers by their greatest common factor, which is 2 in this case. The simplified ratio is 5 inches : 6 inches. Therefore, the correct ratio comparing Jennifer's foot size to David's (in inches) is 5/6 (option B). The correct option is B.