Final answer:
(B) Ovid is the author who was not among this week's primary source readings, which focused on historical and tragic literary works by authors such as Hesiod, Euripides, and Herodotus.
Step-by-step explanation:
The author who was NOT among this week's primary source readings is Ovid. Given the references to ancient historians and playwrights such as Hesiod, Euripides, and Herodotus, we can infer that the primary source readings had a focus on historical and tragic literary works.
Herodotus is known as the founding figure of Greek history-writing, while Euripides is one of the best-known ancient Greek tragedians. Since Ovid was a Roman poet famous for his epic, the Aeneid, and not mentioned in the provided references, he is the author not included in the primary source readings.