Read this excerpt from "An Address Delivered to the Oxford School of Science and Art at the Distribution of Prizes." Ladies and Gentlemen,

You will not expect me, in complying with the custom which requires your Chairman to address a few words to you before distributing the prizes, to give you instruction about Art or Science. One who was educated, as I was, under the old system, can hardly see without a pang the improvement that has been made in education since his time. In a public school, in my day, you learned nothing of Science, Art, or Music. Having received nothing, I have nothing to give. Fortunately, the only thing of importance to be said this evening can be said without technical knowledge of any kind. The School of Art needs better accommodation.

What is the organizational structure of this excerpt?

cause and effect
compare and contrast
central ideas and supporting details
problem and resolution