Sentence 40: \(U\left( {121} \right)\) is:

A. \(U\left( {121} \right) = \left\{ {1;11;121} \right\}\)

B. \(U\left( {121} \right) = \left\{ {1;121} \right\}\)

C. \(U\left( {121} \right) = \left\{ {1;3;11;121} \right\}\)

D. \(U\left( {121} \right) = \left\{ {1;7;11;121} \right\}\)

121 is only divisible by 1; 11; and 121 should \(U\left( {121} \right) = \left\{ {1;11;121} \right\}\)

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