Conservationist: The population of a certain wildflower is so small that the species is headed for extinction. However, this wildflower can cross-pollinate with a closely related domesticated daisy, producing viable seeds. Such cross-pollination could result in a significant population of wildflower-daisy hybrids. The daisy should ttherefore be introduced into the wildflower' s range, since although the hybrid would differ markedly from the wildflower, hybridization is the only means of preventing total loss of the wildflower in its range. Which one of the following principles, if valid, most helps to justify the conservationist's reasoning? ['It is better to change a type of organism that would otherwise be lost, even if the changes are radical, than to lose it entirely.', 'It is better to preserve a type of organism that is in danger of extinction, even if surviving organisms of that type are not vigorous, than to allow something more vigorous to replace it.', 'It is better to take measures to preserve a valued type of organism, even if those measures are drastic, than to accept a less valuable substitute for the organism.', 'It is better to destroy one of two competing types of organisms, even if both are irreplaceable, than to allow both of them to be lost.']