It is proposed to introduce mosquitoes into the wild with genetic alterations that destroy their diseasecarrying capacity. In this way the dangerous wild population could eventually be replaced by a harmless one without leaving room for another disease-transmitting strain to flourish. One candidate gene would interfere with the mosquitoes' finding mates; another would cause the destruction of a disease parasite before the stage at which it could be transmitted; another would disable the mechanism of the mosquito' s own resistance to disease, so that it would die before transmitting the disease. Which one of the following identifies a discrepancy in the proposal above?
A: Two of the proposed ways of destroying disease-carrying capacity in the wild mosquito population would jeopardize the goal of the proposal.
B: Evidence is not presented to show that each alternative method has been successfully tested on a limited scale.
C: None of the three proposed alternatives would assure that there would be fewer mosquitoes in any given area.
D: It does not take into account positive roles that mosquitoes play in the environment, such as serving, in the larval stage, as food for fish.
Choose A, B, C or D as your solution.
A