As a child, Theo often looked at a picture album that included photos of a family reunion. Although Theo had not attended the reunion because he had been ill, he remembers being there. Theo’s mistake best illustrates the "sin" of:

misattribution

Explanation:

As originated by Daniel Schacter's seven sins of memory, the misattribution of memory in Psychology refers to source misattribution or not properly identifying the origin of a memory by the person making the memory recall. It mostly occurs when individuals let their attitudes get in the way of their judgments at time of retrieval. Misattribution has three components:

cryptomnesia,source confusion and false memories.

b. the american revolution

it should be d or b but i'm sure it's d