Consider the following CFG S aB S bA**spaceB b A a**spaceB bS A aS**spaceB aBB A bAA**spaceConsider the following derivation**spaceS aB**space aaBB**space aaBb**space aabSb**space aabbAb**space aabbab**spaceThis derivation is

• A. A leftmost derivation
• B. A rightmost derivation
• C. Both leftmost and rightmost derivation
• D. Neither leftmost nor rightmost derivation