which sentence contains a nonrestrictive clause that is punctuated correctly? my boss—who was recently…

which sentence contains a nonrestrictive clause that is punctuated correctly? my boss—who was recently promoted again is great at motivating her employees. my boss, who was recently promoted again, is great at motivating her employees. my boss who was recently promoted again—is great at motivating her employees. my boss, who was recently promoted again is great at motivating, her employees.
Answer
Brief Explanations:
A non - restrictive clause is set off by commas. It provides additional, non - essential information about the noun it modifies. In the correct option, the clause "who was recently promoted again" is set off by commas, indicating it is non - restrictive.
Answer:
My boss, who was recently promoted again, is great at motivating her employees.