If we rely solely on mathematics then the answer must be A. The other options seem to be from economy so it has nothing with mathematics. Please make sure that this is math task then answer.
I am not sure if I am correct. I think that the angles did not help to solve the problem, ( it makes an obtuse angle) and the unit rate is 421 mph and 384 mph.
2*421+384*2= 1610 miles or 2 (421+384)= 1610 miles