Answer:
The correct answer is their.
Explanation:
In this case, we are talking about a possessive adjective.
Possessive adjectives are used to show to whom an object belongs in a sentence, and for each person corresponds a particular possessive adjective, which is <u>always followed by a noun.
</u>
In this case the people would be <em>Each of the drama members</em> and the object would be the<em> lines.</em>
Each of the drama members receives the personal pronoun: They
Therefore if I want to establish a possessive adjective, the proper one would be their. <em>Their lines</em>.
Remember the right possessive pronouns for each person:
I --- My + object
He ---- his + object
She ---- her + object
It ----- its + object
We ---- Our + object
You ---- your + object
They ---- their + object.
Given this information, we can say that the correct answer is <em>their</em>.