Phosphorous-32 Is a Beta Emitter with a Half-Life of 14

Multiple Choice

Phosphorous-32 is a beta emitter with a half-life of 14.3 days. So, after 42 days, a 100-mg sample will have decayed to 25 mg. Which statement best describes where the rest of the ³²P went?

A) It disappeared.
B) It reacted with air.
C) It turned into sulfur and a beta particle.
D) It turned into silicon and a beta particle.
E) It decomposed into beta particles.