The Critical Points of the System $x ^ { \prime } = x ^ { 3 } - y ^ { 3 } - 8 , y ^ { \prime } = 5 x$

Multiple Choice

The critical points of the system $x ^ { \prime } = x ^ { 3 } - y ^ { 3 } - 8 , y ^ { \prime } = 5 x$ are

A) $( 2,0 ) , ( 0,2 )$
B) $( - 2,0 ) , ( 0 , - 2 )$
C) $( 0,2 )$
D) $( 0 , - 2 )$
E) none of the above