I would say the answer is c
My advice is going to be using your imagination and also really good grammar and include complete sentences and also use words such as ‘although’ or ‘later on’ and carry on :)
It seems that you have missed some necessary details for us to answer the question, but anyway, I have found it and here is the answer. Based on the poem "Prayer Poems", the phrases "they want..." and "they are..." are examples of REPETITION. Hope this answers your question.
The answer which is true about this sentence is that it contains a superlative adjective within an independent clause.
The independent clause is <em>I am the best player, </em>and the superlative adjective is <em>the best.</em>