Determine the Intervals of the Domain Over Which the Function $( - \infty , \infty )$

Multiple Choice

Determine the intervals of the domain over which the function is continuous.
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A) $( - \infty , \infty )$
B) $[ 2 , \infty )$
C) $( - \infty , 3 ) \cup ( 3 , \infty )$
D) $[ 3 , \infty )$