With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: Commodore was unable to make the Amiga successful in the market .
text_B: By the late 1980s , the personal computer market had become dominated by the IBM PC and Apple Macintosh platforms and Commodore 's marketing efforts for the Amiga were less successful in breaking the new computer into this now-established market than its promotions for the 8-bit line .
NOT ENOUGH INFO.