A. Because an allusion is a reference to a known figure. All other sentences contain an allusion to famous musicians.
It would be A or c because if u read carefully u can see what it says and if u look back then u can see
Human activity has destroyed the nests of leather back sea turtles on beaches around the world. Consequently, the leather back population has dropped in the last century.
If the grammatical structure that is italicized is <em>although her personality had not changed at all, </em>then the correct answer is adverb clause. Adverb clauses function the same way simple adverbs do - they answer the questions such as why, where, when, how, etc.
