Tell Whether the Statement Is True or False $\mathrm { A } = \{ 9,10,11,12,13,14 \} , \mathrm { B } = \{ 11,13,15 \} , \mathrm { C } = \{ 9,10,12,14 \} , \mathrm { D } = \{ 9,14 \}$

True/False

Tell whether the statement is true or false.
-Let $\mathrm { A } = \{ 9,10,11,12,13,14 \} , \mathrm { B } = \{ 11,13,15 \} , \mathrm { C } = \{ 9,10,12,14 \} , \mathrm { D } = \{ 9,14 \}$ , and $\mathrm { U } = \{ 9,10,11,12,13,14,15 \}$ . $\mathrm { A } \subseteq \mathrm { U }$