Find the Least Common Denominator (LCD) $$\frac { 2 } { 3 x } , \frac { 5 } { 14 x ^ { 3 } } , \frac { - 2 } { 7 x ^ { 2 } }$$

Multiple Choice

Find the least common denominator (LCD) . $$\frac { 2 } { 3 x } , \frac { 5 } { 14 x ^ { 3 } } , \frac { - 2 } { 7 x ^ { 2 } }$$

A) $3 x$
B) $42 x ^ { 3 }$
C) $42 x$
D) $294 x ^ { 6 }$