According to the picture, what limitation is faced by the green (commercial) pick-up truck that wishes to turn right?

1. A The motor scooter intends to drive straight; hence there is no danger in turning right.
2. B The pick-up truck is permitted to turn right even though the motorcycle is on his right because the law does not forbid it
3. C The driver of the pick-up truck should be careful, because there is another vehicle driving in a “blind spot” to his right.
4. D The pick-up truck is statutory prohibited to turn right.