Question

what do all good orienteering compasses have? a waterproof case b battery pack c two arrows d north/south arrow

Explanation:

Orienteering compasses rely on magnetic north for navigation. A waterproof case is not universal (some basic models lack it), battery packs are for electronic compasses only (not all orienteering compasses are electronic), and two arrows are not a standard required feature. A clear North/South arrow is essential to indicate magnetic orientation, which is core to all functional orienteering compasses.

Answer:

D. North/South arrow