$\text { Identify the open intervals where the function } f ( x ) = 6 x ^ { 2 } - 6 x + 4 \text { is increasing or }$

Multiple Choice

$\text { Identify the open intervals where the function } f ( x ) = 6 x ^ { 2 } - 6 x + 4 \text { is increasing or }$ decreasing.

A) decreasing on $( - \infty , \infty )$
B) increasing on $( - \infty , \infty )$
C) increasing: $\left( - \infty , \frac { 1 } { 2 } \right)$ ; decreasing: $\left( \frac { 1 } { 2 } , \infty \right)$
D) decreasing on $( - \infty , 0 )$ ; increasing on $( 0 , \infty )$
E) decreasing: $\left( - \infty , \frac { 1 } { 2 } \right) ;$ increasing: $\left( \frac { 1 } { 2 } , \infty \right)$