B.) Reference Group
<em>A reference group is the group of people that a person looks to as a point of comparison</em>. This is in terms of attitude, looks, behavior, skill, etc.
In Marina's case, she looks up to the two singers and uses them as a reference point in terms of her singing skill and style, as well as her behavior. In doing this, they become her <em>reference group</em>.
Sepoy Rebellion. noun. ... a revolt of the sepoy troops in British India (1857–59), resulting in the transfer of the administration of India from the East India Company to the crown. Expand. Also called Sepoy Mutiny, Indian Mutiny.