List the five letters which are always vowels followed by an example of a word using each of the vowels as a long vowel.

a, e, i, o, u

Explanation:

a ace, e bleach, i pilot, o go, u duke

c. a group of tribes that formed a confederacy

i think the best answer would be d allowing 30 seconds between response would give time for what was already said to sink down in your mind.