For the electrophilic substitution reaction involving nitration, which of the following sequence regarding the rate of the reaction is true?
A. `KC_(6)H_(6) gt KC_(6)D_(6) gt KC_(6)T_(6)`
B. `KC_(6)H_(6) lt KC_(6)D_(6) lt KC_(6)T_(6)`
C. `KC_(6)H_(6)=KC_(6)D_(6)=KC_(6)T_(6)`
D. `KC_(6)H_(6)gtKC_(6)D_(6)ltKC_(6)T_(6)`