Concept:Helena chooses to reveal the elopement plan to Demetrius in the hope of winning his affection.
Explanation:Helena is heartbroken because Demetrius once swore love to her but now pursues Hermia.
She learns that Hermia and Lysander intend to run away together to the forest to escape Athenian law.
At the end of the scene, Helena says she will go and tell Demetrius of Hermia's planned flight.
She hopes that by doing this favour for Demetrius, he may look kindly upon her once again.
This resolution directly matches the option that the speaker resolves to tell Demetrius about Hermia's flight.
Answer:C. Demetrius of Hermia's flight