Regarding the Question of the Precise Time at Which a Radioactive

Regarding the question of the precise time at which a radioactive nucleus will decay:

A) The time is completely unpredictable (i.e., we cannot know anything about it) , because we cannot know anything about an object as small as an individual nucleus.
B) The time is precisely predictable, provided we have sufficient information about the condition of the nucleus.
C) The time is only statistically predictable, because our measuring instruments are not yet sufficiently precise.
D) The time is precisely predictable for any particular isotope, regardless our knowledge of its precise state.
E) The time is only statistically predictable, because of unavoidable uncertainties associated with quantum theory.