Answer: Compound sentence.
Explanation: Compound sentences contain 2 independent clauses combined by a comma and coordinating conjuction.
[Mom baked cookies for the school picnic] - Independent clause
[Dad volunteered to grill the hamburgers] - Independent clause
Both the sentences are independent clauses and are combined by the coordinating conjuction ( and) and a comma.
In O'Brien's excerpt those sentences are: <span>In a way, it seemed, he was part of the morning fog, or my own imagination, but there was also the reality of what was happening in my stomach. This sentence evokes a bodily reaction and calls it "the reality". It is not just imagined; it really happens. </span><span>I tried to swallow whatever was rising from my stomach, which tasted like lemonade, something fruity and sour. It's as if his body has its own way of processing the distressing information. He feels a very specific kind of nausea, triggered by his mental processes.
In Steinbeck's excerpt it's these sentences: </span><span>In all kinds of combat the whole body is battered by emotion. The ductless glands pour their fluids into the system to make it able to stand up to the great demand on it. They describe a very physical reaction, which is a product of emotional distress. It's as if the body is trying to defend the whole system from detrimental factors.</span>
The specific aspect of literary criticism that demonstrates the author's message as significant or worthwhile is the author-based approach. It is also called the Expressive Theory. It depicts that the best interpretation of a text (poem, novel, fictional stories, etc) comes from the author himself.
The reader-based approach is not entirely reliable because every reader may see a text in a different perspective. There are even cases wherein readers interpret a text in a deep, deep way while the author meant everything in the literal sense. Everything varies from case to case.
After test would be your answer for sure :)