Which of the following best describes the set of strings that are Boolean expressions (e.g., "not p or (q and r)"), with the precedence rules 'not' > 'and' > 'or' for the three logical operators, left-associativity is supported, and sub- expressions in parentheses are also allowed? O A. {S→E, E→T | E or T, T→ F | T and F, F → G | not G, G → (E)\pIq|r} O B. {S→E,E→T | E and T, T → FIT or F, F → G | not G, G → (E)[p]q[r} C. {S → El not E, E → TIE and T, T→FIT or F, F→ (E) IpIq|r} O D. {S → El not E, E → T | E or T, T→F | T and F, F → (E) |p|q|r}

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