Why Has Doppler Radar Been Very Valuable in Preventing Loss

Multiple Choice

Why has Doppler radar been very valuable in preventing loss of life by tornadoes?

A) It can detect development of thunderstorm rotation and mesocyclone formation associated with tornadoes.
B) It can detect the speed of a thunderstorm to allow accurate forecasting of arrival time of a tornado and its track.
C) It can detect hail moving through the thunderstorm,allowing hail forecasts and its association with tornadoes.
D) It can "see through" heavy rain and directly image tornadoes embedded in thunderstorms with heavy rain.