Jack spent~$\dfrac{1}{24}$~of money on a new watch and~$\dfrac{5}{6}$~of money on a new phone. What fraction of the money did Jack spend altogether? 
选项为:A:$\frac{11}{12}$  B:$\frac{11}{24}$  C:$\frac{7}{8}$  D:$\frac{3}{4}$  请回答其中一个选项.