Which grammar rules violate the requirement of the operator grammar? A, B, C are
variables and a, b, c are terminals
(i) $$A \rightarrow BC$$
(ii) $$A \rightarrow CcBb$$
(iii) $$A \rightarrow BaC$$
(iv) $$A \rightarrow ε$$

A

(i) only

B

(i) and (ii)

C

(i) and (iii)

D

(i) and (iv)