Though Uranium-238 Is Radioactive, It Can Be Worked with Safely

Though uranium-238 is radioactive, it can be worked with safely in a glovebox with no additional precautions. This is because ________

A) uranium-238 emits gamma rays and they are not absorbed very strongly by biological tissue.
B) uranium-238 emits alpha particles which are weakly penetrating and do not reach beyond the glovebox.
C) gamma rays and alpha particles emitted by the uranium-238 do not penetrate beyond the glovebox.
D) the half-life of uranium-238 is so long that minimal radiation is emitted.
E) the nitrogen atmosphere of the glovebox inhibits radioactive decay.