is the group of words in bold a phrase or a clause? by refusing to surrender her seat to a white passenger…

is the group of words in bold a phrase or a clause? by refusing to surrender her seat to a white passenger, african american activist rosa parks inspired a boycott of city buses in montgomery, alabama, and helped strengthen the civil rights movement. phrase clause
Answer
Brief Explanations:
A clause has a subject - verb combination. The bolded part "African American activist Rosa Parks" is a noun phrase identifying the person, but there is no verb within this group of words. So it is a phrase.
Answer:
phrase