Answer:
Option D.
Explanation:
Option A. a 16 oz bag of rice for $2.42
Therefore, unit rate of the rice will be =
per oz
Option B. a 12 oz box of rice for $1.93
Unit rate of the rice will be =
per oz
Option C. a 6 oz box of rice for $0.90
Unit rate of the rice will be =
per oz
Option D. a 9 oz box of rice for $1.25
Unit rate of the rice will be =
per oz
Therefore, Option D would be best buy.