The correct option is C Show that public universities have grown increasingly diverse over time
The fourth paragraph talks about how the legislative steps taken in 1890 to cut through racial injustices and discrimination in public universities, though not much effective then, has led gradually to its actual purpose- openness and diversity in public universities. In this context, the author uses the fact that more women than men now attend college to show that public universities have grown increasingly diverse over time. So, option C is the correct answer. The other options are incorrect as they do not serve this purpose.