In Radiology,the Term Dose Is Defined As

In radiology,the term dose is defined as:

A) the dose multiplied by the quality factor(Q) ,and is expressed in rems.
B) the amount of ionization in the air produced by x-rays or gamma radiation.
C) the amount of energy,or ionizing radiation,produced by the x-ray machine.
D) the amount of radiation energy absorbed per unit mass of tissue at a particular site.