How did the speaker's career goals change

The speakers career goal changes because he was influenced by the motivation provided to him.

He starts to think outside the box, and so he is not willing to follow the society norms instead follows his own will and wants to achieve his dreams.

He had many dreams which he intended to achieve since his childhood, now he has a clear path in front of him to achieve the goal.

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i don't know sorry i cannot read a novel in 30 min.

explanation:

but just in case i think the answer is b.