Answer:
She would feel that it is important to stand up for what you believe for and in her case this would definitely be something she would feel that she needed to stand up for.
Explanation:
" clarinet " is an appositive in this sentence
She should begin proper nouns with a capital letter as nouns are always capitalized. Also, she should italicize the names of magazines as the titles of things that can stand by themselves are normally italicized.