Asingular subject joined by or/nor requires a

What is the best revision of this statement from the body of a cover letter?

Amaple syrup producer records the amount of sap collected from each of his trees.the line plot shows the results of one day

Using context clues read the sentence, then use context clues to determine the definition of parameters. setting clear parameters, such as rules, guidelines, or instructions, people understand what is expected of them. what is the definition of parameters? which type of context clue is used in the sentence?