Pink1 and Parkin mutant flies both die prematurely, have degeneration of dopamine neurons, and have mitochondria with abnormal morphology and function. What happened when Parkin was overexpressed in Pink1 mutant flies?
A) They still died, but their dopamine neurons were not degenerated. B) The defects appeared earlier and so the Drosophila died even younger. C) The Parkin flies were rescued. D) There was no change.