Whose tell me what is life?

Whose tell me what is life? Can you tell me what is the meaning of life can you tell me ______ this is?A.what; B.if; C.whose; D.who whose smile make me a better understanding of what life is a can you tell me?whose backpack is that?合并成一句我的答案can you tell who can tell me.what. is it? What is love?Who can tell me? Who can tell me?What is JB? Tell me what the word is already . what is electricity?can you tell me NC is what?please tell me,thanks! tell me what is on your mind