Step-by-step explanation:
It is known that sulfur is a group 16 element. And, elements which are present in the same tend to show similar chemical properties because they contain same number of valence electrons.
As a result, they tend to show similar chemical reactivity and other similar chemical properties.
All the elements of group 16 are O, S, Se, Te, and Po.
Generally oxygen exists as a diatomic molecule or non-metal. But S and Se exists as polyatomic non-metals.
Thus, we can conclude that she should turn her attention to selenium (Se) element.