A manufacturing firm maintains one product assembly line to produce signal generators. Weekly demand for the generators is 35 units. The line operates for 7 hours per day, 5 days per week. What is the maximum production time per unit in hours required of the line to meet the demand ?
A. 1.0 hour per unit
B. 1.2 hours per unit
C. 1.4 hours per unit
D. 1.6 hours per unit