At What Points Is the Given Function Continuous?
-F(x, Y $( x , y , z )$

Multiple Choice

At what points is the given function continuous?
-f(x, y, z) = ln(x + y + z - 6)

A) All $( x , y , z )$ such that $x + y + z \geq 6$
B) All $( x , y , z )$ such that $x + y + z > 6$
C) All $( x , y , z )$ in the first octant
D) $\operatorname { All } ( x , y , z )$