Firm A operates 10 hours each day, producing 100 parts/hour. If productivity were increased 30%, how many hours would the plant have to work to produce 1000 parts?
A. between 8 and 9 hours
B. between 2 and 6 hours
C. between 9 and 10 hours
D. less than 2 hours
E. between 6 and 8 hours