Which line from the text provides an example of how the author creates a feeling of sadness for enrique?

i think the answer is c.  

the unsaturated fatty acid is a fat consist of one or more double bond in the fatty acid chain. if it contains one double bond then called as monounsaturated fatty acid however if, it contains more than one bonds called as a polyunsaturated fatty acid. true fatty acids are called unsaturated fatty acids as it reduces the risk of high blood cholesterol and good for health.

c. explains words’ origins and variations.

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