Question: Let A = { epsi , d c , d c c } and B = { c , d c , c c

Let
A={\epsi , d c, d c c} and B={c, d c, c c d}
The concatenation of languages A and B,
A B
is the set: {\epsi , c, d c, c c d, d c c, d c d c, d c c c, d c c d d, d c c d c, d c c c c d}{\epsi , c, d c, c c d, d d c, d c d c, d c c c, d c c c d, d c c d c, d c c c c d}{c, d c, c c d, d c c, d c d c, d c c c, d c c c d, d c c d c, d c c c c d}{c, d c, c c d, d c c, d c d c, d c c c d, d c c d c, d c c c c d}{c, d c, c c d, d c c, d c d c, d c c c, d c c d d, d c c d c, d c c c d d} None of the above.

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