Let $A = \{a, b\}$ and $B = \{a, b, c\}$. Is $A \subset B$? What is $A \cup B$?
- AYes,$A \subset B$ and $A \cup B = \{a, b, c\}$
- BNo,$A \not\subset B$ and $A \cup B = \{a, b, c\}$
- CYes,$A \subset B$ and $A \cup B = \{a, b\}$
- DNo,$A \not\subset B$ and $A \cup B = \{a, b\}$
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