To determine which Doppler radar weather map shows the most severe rain storms, you would need to look at the dBZ values presented on the maps. Each map would have a color scale that corresponds to different dBZ levels, which indicate the intensity of rainfall.
The map with the highest dBZ values (typically the colors representing heavy rain or thunderstorms, such as deep reds, purples, or bright oranges) would indicate the most severe rain storms. Look for areas where the dBZ values exceed 40 or 50 dBZ, as those typically indicate heavy rainfall.
Without the actual images or details of the dBZ values for maps A, B, C, and D, I can't specifically identify which map shows the most severe rain storms. If you have the images or values for each map, please provide them, and I can help identify the one with the most severe rain.