Choose the best answer which sentence correctly identifies the adjective phrase? A the discovery , | which was first of its kind in several years |, caused an international stir. B the discovery which was the first of its kind,| in several years|, caused an international stir. C the discovery which was the first of its kind in several years, |caused an international stir | . D | the discovery | , which was one of the first kinds and several years caused an international stir.