This is supported in P4. We see that, while just a minority of the unabraded seeds germinated, some of these unabraded seeds did germinate, showing that thinning through abrasion is not necessary for germination.

Anti-supported. Actually, in P3, we see that many of the pits fed to turkeys were destroyed, so we can’t say that the seeds were always released undamaged.

Unsupported. We know that the author thinks that Temple was probably mistaken about his overall hypothesis, but we don’t know if Temple was mistaken about the claim in (C) specifically. Temple may have been right about the abrasion caused by dodos, even if his overall hypothesis was wrong. We just don’t have the information to claim that Temple was mistaken in this belief specifically.

Unsupported. The passage doesn’t address the frequency with which this abrasion occurred in past centuries, and we don’t have enough information to make a general comparison between what happened in past centuries and what happens today. We might be able to infer what Temple thinks about this, but remember that the author disagrees with Temple. Either way, (D) is not stated in the passage.

Unsupported. The passage doesn’t say that something else has been abrading pit walls since the dodo went extinct, so we can’t say that this is a fact that Temple overlooked. The author does indicate that Temple’s overall hypothesis (that the extinction of the dodo caused the population decline of the trees) is probably incorrect, but the passage never says that Temple was wrong specifically for the reason stated in (E).