Used to speculate about what could happen, what might have happened, and what we wish would happen. <span>To </span>form<span> the stem of these verbs, remove the vowel from the infinitive ending. Then, add the </span>conditional<span> endings. A good example of this type of verb is poder (to be able to).</span>
Chica is feminine... reservada is feminine... so which of your options are feminine? Ella and la. Ella means she so it can't work, as that would mean she girl is very reserved. La is the femenine the. So that is your answer.