which is a better route?

i take over the car and started sending them to school and myself to work. from yio chu kang road to marine parade can be a long distance. which way is cheap and good? 

 

route a - 26 km (25 mins)
yio chu kang road => cte (sle) => tpe => kpe => ecp => marine parade

route b - 17 km + $2 erp (18 mins)
yio chu kang road => cte (town) => pie => eunos => still road => marine parade

route c - 15.6 km + $2 erp (23 mins)
yio chu kang road => cte (town) => pie => kpe => ecp => marine parade

have discuss with darling, my boss and shared with friends. we had come to a conclusion that route a should be a better option. with route a, i would have travel on all the expressway daily. 

 

there is only 1 way to go to fetch them, kpe, pie, cte, yio chu kang road.