In his garden, trey plants carrot seeds \dfrac{1}{4}\text{ in} 4 1 ? in deep and bean seeds \dfrac7{8}\text{ in} 8 7 ? in deep. what expression can be used to find how much deeper trey planted the bean seeds than the carrot seeds? choose 1 choose 1 (choice a) a \dfrac{7}{12}-\dfrac{2}{12} 12 7 ? ? 12 2 ? (choice b) b \dfrac{7}{12}-\dfrac{1}{12} 12 7 ? ? 12 1 ? (choice c) c \dfrac{7}{8}-\dfrac{2}{8} 8 7 ? ? 8 2 ? (choice d) d \dfrac{7}{8}-\dfrac{1}{8} 8 7 ? ? 8 1 ?