10 allena and charissa were discussing whether cl2 {"version": "1.1","math": "cl2"} is an element or a compound. allena said that it is an element, because it has only one type of atom. charissa said that it is a compound, because it has more than one atom. who is correct? question 29 options: a. allena is correct. it is an element, because it is only made of chlorine atoms. b. allena is correct. it is an element, because it is only one atom. c. charissa is correct. it is a compound, because it has a two. d. charissa is correct. it is a compound, because it is made of more than one atom.