Choose the One Alternative That Best Completes the Statement or Answers

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
-A certain radioactive isotope decays at a rate of $0.2 \%$ annually. Determine the half-life of this isotope, to the nearest year.

A) $151 \mathrm { yr }$
B) $347 \mathrm { yr }$
C) $3 \mathrm { yr }$
D) $250 \mathrm { yr }$