Final answer:
The type of context clue used to uncover the meaning of 'refuted' in the passage is a synonym, indicated by the use of the word 'proved'.
Therefore the correct option is d. synonym
Step-by-step explanation:
In the passage, the context clue used to determine the meaning of the word 'refuted' is d. Synonym.
The explanation offered right after stating that Sam 'refuted' the teacher's claim is that she 'proved' Roosevelt was president in 1901 using an encyclopedia. Here, 'proved' is used as a synonym for 'refuted', helping us understand its meaning.
Learn more about Context Clues