A CFG for a program describing strings of letters with the word “main” somewhere in the string:

• A. -> m a i n -> | epsilon -> A | B | … | Z | a | b … | z
• B. –> m a i n –> –> A | B | … | Z | a | b … | z
• C. –> m a i n –> | epsilon –> A | B | … | Z | a | b … | z
• D. None of the mentionedView Answer