Question

what did philip ii insist on from the greek states that swore an oath of loyalty to him?
○ that they cooperate with him in war against persia
○ that all greek states support his son when he came to power
○ that greek states work to improve their cavalry
○ that rival greek states leave the alliance

Explanation:

Philip II of Macedon, after gaining influence over Greek states (via the League of Corinth), insisted that the Greek states that swore loyalty to him cooperate with him in his planned war against Persia. The other options are inconsistent with historical facts: there's no primary record of him insisting on support for his son's succession from these states at that oath - taking stage, improving cavalry was not a key demand here, and he sought unity (not rival states leaving the alliance) for his Persian campaign.

Answer:

A. That they cooperate with him in war against Persia