Express the Number in Terms of J (If Necessary, Round $\sqrt { - 6 }$

Multiple Choice

Express the number in terms of j (if necessary, round the result to three significant digits) . $\sqrt { - 6 }$

A) $- 2.45 j$
B) $6 j$
C) $2.45$
D) $2.45 j$
E) $- 2.45$