5. Which of the following assumptions was made in all three studies?
Your Answer is
Correct Answer is D
Explanation
Exclude A first, because the five-year period in the fourth line of Study 2 refers specifically, so it refers to the same time as in Study 1. The third line of Study 3 is also the five-year period, which also refers to the same time;
Exclude B, because there is infiltration in table 2;
Exclude C, because according to common sense , inflow and outflow cannot always be constant