Which of the Following Statements Concerning Radiation Absorption by Living

Which of the following statements concerning radiation absorption by living tissue is/are CORRECT?
1) The "quality factor" takes into account the differences in damaging power of the various forms of radiation.
2) One gray denotes the absorption of 1 joule per kilogram of tissue.
3) The SI unit for biological damage is a sievert (Sv) ,which is determined by multiplying grays by the quality factor.

A) 1 only
B) 2 only
C) 3 only
D) 2 and 3
E) 1,2,and 3