Choose the option that correctly revises the following sentence. The artist's urban period, 1947 1956, was one of his most productive
times.
Select one:
The artist's urban period, 1947 1956—was one of his most productive times,
The artist's urban períod, 1947-1956, was one of his most productive times,
The artist's urban period—1947-1956—was one of his most productive times,
The artist's urban period. 1947-1956. was one of his most productive times.

b is the answer.   i sat on the lumpy sofa, totally exhausted, with a bad taste in my mouth, wondering what i should do next.  

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: