Banu sells tickets for a three-car passenger train. After selling a certain number of tickets, Banu sees that 6 seats in the first car and 13 seats in the second car remain empty.
Banu calculates how many tickets she needs to sell at minimum to guarantee selling at least one ticket from each of the three cars and finds the result to be 23.
Accordingly, what is the total number of empty seats in the train?\\
A) 24\\
B) 28\\
C) 30\\
D) 33\\
E) 35