If 3 men or 4 women can construct a wall in 43 days, then the number of days that 7 men and 5 women take to construct it is :
If 3 men or 4 women can construct a wall in 43 days, then the number of days that 7 men and 5 women take to construct it is : A. 12 days B. 14 daysC. 16 days D. 18 days