Answer:
A. can exist even
Explanation:
For added visibility, the area of the crosswalk may be marked with white diagonal lines at a 45-degree angle to the line of the crosswalk or with white longitudinal lines parallel to traffic flow. When diagonal or longitudinal lines are used to mark a crosswalk, the transverse crosswalk lines may be omitted. Sometimes a marked crosswalk will have flashing lights attached to the signage, usually at busy intersections or where there have been pedestrian accidents. An unmarked crosswalk does not have lines, words, or images painted on the roadway. An unmarked crosswalk does not have signage or flashing lights.
A crosswalk can exist even when there are no pavement markings.
Crosswalks with markings show where pedestrians should go and tell drivers to stop for them.
At signalized junctions and other chosen sites, crosswalks are frequently installed.
Thus, we can conclude that option A.
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