A glossary is the list that includes the names of the words and terms associated with a specific subject.
The reference that will be most helpful in understanding that the word 'parallel' is related to math is:
D. glossary
A glossary is a type of dictionary that has words associated with specific text and dialects.
The meaning of the word 'parallel' can be many if it is looked and searched in a dictionary. In this situation, Jennifer is reading a Math book, therefore she should look into glossary to get the exact meaning of 'parallel' in terms of Math.
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