The Release of a Parasitic Wasp in California Helped Control

The release of a parasitic wasp in California helped control the infestation of scale insects on citrus trees. However, it also caused the near-extinction of a different species of parasitic wasp. Should we consider this experiment an unqualified success?

A) Yes; the scale insects are controlled, and the extinct wasp wasn't ecologically important.
B) Yes; as long as we get a result that helps humans, it does not matter what the effect is on other species.
C) No; the effect of the loss of the original species of wasp cannot be predicted and may be more significant than the benefits to the citrus tree crop.
D) No; the citrus tree population in California will now be able to rise to unmanageable numbers.