Write the Word or Phrase That Best Completes Each Statement $0.15 \%$

Multiple Choice

Write the word or phrase that best completes each statement or answers the question.
-A certain radioactive isotope decays at a rate of $0.15 \%$ annually. Determine the half-life of this isotope, to the nearest year.

A) $201 \mathrm { yr }$
B) $333 \mathrm { yr }$
C) $5 \mathrm { yr }$
D) $462 \mathrm { yr }$