Answer:
3. After working with the trainer I was able to get a chance to sit and stay
Step-by-step explanation:
A modifier is a a verb or an adjective which are also known as describing or helping verbs and are used alongside nouns or verbs.
In the above sentence, "a" is the wrong helping verb that is used before the name of the dog and due to which the entire meaning of the sentence has changed.
Chance is the name of the dog in the given example.
Therefore option 3 After working with the trainer I was able to get a chance to sit and stay is the correct answer.