Consider the operation minus the reciprocal of, defined by a \diamond b=a-\dfrac{1}{b}. What is ((1 \diamond 2) \diamond 3)-(1 \diamond(2 \diamond 3)) ?

**Answer Choices**

A. -\dfrac{7}{30}

B. -\dfrac{1}{6}

C. 0

D. \dfrac{1}{6}

E. \dfrac{7}{30}

Consider the operation minus the reciprocal of, defined by a \diamond b=a-\dfrac{1}{b}. What is ((1 \diamond 2) \diamond 3)-(1 \diamond(2 \diamond 3)) ?

**Answer Choices**

A. -\dfrac{7}{30}

B. -\dfrac{1}{6}

C. 0

D. \dfrac{1}{6}

E. \dfrac{7}{30}