Final answer:
The mode of the scores on the science quiz is 89.
Step-by-step explanation:
The mode of a set of scores represents the value that appears most frequently. Based on the given options, the mode of the scores on the science quiz is 89, as it is the value with the highest frequency. The scores in the 60s, 70s, and 80s each have a lower frequency. Therefore, the correct answer is A) 89.
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