Sensitivity analysis is concerned with how certain changes affect a. the feasible solution. b. the degenerative solution. c. the optimal solution. d. the unconstrained solution.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.