I am working on a guided reading for apush Chapter 20 and am confused about a given question. the question says "evaluate the causes and effects of...

I am working on a guided reading for apush Chapter 20 and am confused about a given question. the question says "evaluate the causes and effects of the Spanish-American war. Your notes should include basic descriptions of each cause and effect listed but also address the prompt with complex analysis."

The question then includes a list of example causes and effects

I understand defining the events (like vocabulary terms) but what is meant by complex analysis?