If the Half-Life of Vanadium-48 Is 16 Days,it Is True

If the half-life of vanadium-48 is 16 days,it is true that

A) vanadium-48 is a beta emitter.
B) the decay rate would be different if the chemical environment of vanadium-48 is changed.
C) after 32 days a sample of vanadium-48 would have completely decayed.
D) after 16 days 50% of a sample of vanadium-48 would have decayed.
E) vanadium-48 would decay faster in its first half-life than in later half-lives.