What is the value of the product
\left( 1+\dfrac{1}{1} \right).\left( 1+\dfrac{1}{2} \right).\left( 1+\dfrac{1}{3} \right).\left( 1+\dfrac{1}{4} \right).\left( 1+\dfrac{1}{5} \right).\left( 1+\dfrac{1}{6} \right)?
Answer Choices
A. \dfrac{7}{6}
B. \dfrac{4}{3}
C. \dfrac{7}{2}
D. 7
E. 8