It's controlled room. Unauthorized person'scome inside. A. don't have to B. can't C. can D. wouldn't

d

explanation:

answer: the tobacco industry has traditionally been one of the most important industries in north carolina and a backbone of the state's agricultural heritage. yet as the north carolina economy continues to transition from an agricultural economy to a manufacturing and, increasingly, service-based economy, the industry faces new challenges, both at home and abroad

explanation:

assuming the underlined word is "regnant", the correct answer is b) ruling.