Answer: d.overconfidence
Explanation: Overconfidence is a bias to see our judgement and abilities in a better light than they actually are when viewed objectively. Sylvie and Ray display overconfidence here because their confidence judgement is higher than their objective accuracy.
Some factors that contribute to overconfidence in test taking are the perceived ease of the questions, and the desire for an answer to be true, either due to a bias or a desire to seem knowledgeable.