Aunt Em is a fictional character from the Oz books. She is the aunt of Dorothy Gale and wife of Uncle Henry, and lives together with them on a farm in Kansas.
"<span>C. She was able to answer most students' questions"" is incorrect because student should be singular. It should </span>be "<span>She was able to answer most of the students' questions.</span>"
The subordinate clause is "when you go outside."
A subordinate clause contains a verb and a subject. Also, this type of clause doesn't form a complete sentence.
The subordinate conjunction is when, the subject is you, and the verb is go.