The correct answer is C. Circutous. The correct spelling is "circuitous".
A solution is a liquid mixture that contains one or more solutes dissolved in a solvent. Tuition is the fee charged for instruction at an educational institution. Fruition is the act of achieving something that one has desired or worked for.
The word "circutous" is not a real word. The correct spelling is "circuitous". A circuitous route is a long and winding one.
