B
I need 20 characters lol
The answer is A, first the question said parallel so it should have same gradient and the gradient of the equation is 2 So eliminate D and bring (3,1) in each of the last three equation, and you will find just A conformed
Answer:−x2−6xy+8y2+9yz−12
I would say c
Ccccccccccccccccccccccc