If today is the 20th, may we stop beyond this sign?

If today is the 20th, may we stop beyond this sign?
A)Yes.Correct
B)No.
This sign prohibits parking during the second half of the month. From 9 a.m. on the 16th until 9 a.m. on the 1st. The 20th belongs to the second half, so parking would be prohibited. The question refers to whether stopping is prohibited, so the correct answer would be yes, since the sign does not prohibit stopping, only parking.