This could be true. We only know what happened in one specific scene in one play. Further, neither character’s illiteracy is specifically mentioned, so according to (A), both characters would be presumed to know how to read. This presumption isn’t rejected by the stimulus.

This could be true. We have no information to support or reject this claim.

This could be true. We only have information about one scene in one play where something was read silently; we don’t know whether or not reading out loud occurred commonly.

The stimulus provides evidence against this. We can reject the claim in (D) because the stimulus provides an indication that someone read silently. (D) says that reading silently never happened, and the stimulus provides an example of it happening, so the stimulus rejects (D).

This could be true. We only know what happened in this scene in this one play; we don’t know how commonly prophecies were written down in ancient Greece. We don’t have the information to reject this claim.