A dehydration reaction links two glucose molecules to produce maltose. If the formula for glucose is `` C _{6} H _{12} O _{6} `` then what is the formula for maltose?
(A) `` C _{12} H _{24} O _{11} ``
(B) `` C _{12} H _{20} O _{10} ``
(C) `` C _{12} H _{24} O _{12} ``

(D) `` C _{12} H _{22} O _{11} ``