The correct options are
A Symbols are easy to interpret.
B Symbols are smaller than words.
D Symbols occupy less space on a map compared to other respresntations.
The symbols on a map are smaller than words and so occupy lesser space on the map. Also, they are easily interpretable and can be easily spotted on maps.
The tabular content which indicates the meaning of different symbols on a map is necessary but occupies some additional space on the map.