This sign placed above a lane at a toll booth indicates that in it...
A)the toll can only be paid by card.
B)payment of the toll using the dynamic toll or electronic toll collection system is mandatory.
C)payment can be made using the dynamic toll or electronic toll collection system.Correct
The sign in the question indicates that vehicles travelling in a lane marked in this way may make payment using the electronic toll collection system, but not mandatorily — they may also use other payment methods.
Not to be confused with the same sign but circular, which requires payment exclusively using the electronic toll collection system.