Find the Complement of the Set $\{x \mid x$ Is a Whole Number Less Than 6

Multiple Choice

Find the complement of the set.
- $\{x \mid x$ is a whole number less than 6 $\}$ if $U$ is the set of all whole numbers

A) $\{x \mid x$ is a whole number $\geq 6\}$
B) $\{x \mid x$ is a whole number $>6\}$
C) $\{x \mid x$ is a whole number $<6\}$
D) $\{x \mid x$ is a whole number $\leq 6\}$