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I sharpened my skills under the mentorship of my coach.
You need a noun to complete this sentence, and mentorship is the only noun here - the rest of the words are adjectives.
Answer
The subjunctive verb mood is meant for expression suggestions, desires, wishes. Subjunctive mood is of three mods in English grammar. This is indicated by an indicative verb such as wish or suggest, paired then with a subjunctive verb.
Jessica listen to a grieving friend with great concern.
The second one is the best answer