The Position of a Model Train, in Feet Along the Railroad

Multiple Choice

The position of a model train, in feet along the railroad track, is given by $s ( t ) = 3 t + 3$ after t seconds.
When will the train have moved a distance of 33 feet

A) after 30 seconds
B) after 10 seconds
C) after 13 seconds
D) after 12 seconds
E) after 11 seconds