Question $7(1$ point$)$

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Let A $=\{$b$,$ a$,$ c$,$ k$\},$ B $=\{$t$,$ a$,$ s$,$ k$\},$ C $=\{$b$,$ a$,$ t$,$ h$\}.$ Using these sets, find the

$.$

Question $7$ options:

$\{$a$,$ k$\}$

$\{$a$,$ k$,$ t$\}$

$\{$a$\}$

$\{$a$,$ t$\}$