B:	they are because doctors are performing many more tests.
b iː WORD_BOUNDARY ð eɪ WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY b ɪ k ʌ z WORD_BOUNDARY d ɑ k t ə ɹ z WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY p ə ɹ f ɔ ɹ m ɪ ŋ WORD_BOUNDARY m ɛ n i WORD_BOUNDARY m ɔ ɹ WORD_BOUNDARY t ɛ s t s WORD_BOUNDARY