The straight lines \( 4 a x+3 b y+c=0 \), where \( a+b+c \) \( =0 \), are concurrent at the poin...

The straight lines \( 4 a x+3 b y+c=0 \), where \( a+b+c \) \( =0 \), are concurrent at the point
(A) \( (4,3) \)
(B) \( (1 / 2,1 / 3) \)
(C) \( (1 / 4,1 / 3) \)
(D) none of these