Discussion
An LR(1) item differs from an LR(0) item by carrying
Answer: D
Correct answer: a lookahead terminal valid for that particular context
An LR(0) item records only how far through a production the parser has got. The LR(1) item adds a terminal that may legitimately follow in this context, which lets the parser distinguish situations that the LR(0) automaton merges - and that extra discrimination is exactly what resolves the conflicts SLR cannot.
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