If the Map Distance Between Genes a and B Is

Multiple Choice

If the map distance between genes A and B is 10 map units and the map distance between genes B and C is 25 map units,what is the map distance between genes A and C?

A) 15 map units
B) 35 map units
C) either 15 map units or 35 map units,depending on the order of the genes
D) The map distance between A and C can not be predicted from these data.
E) 5 map units