This is the problem.

Solve the system. x + 4y - 7z =4 - X - 4y + 7z= -4 2x + 8y - 14z = 8 What is the solution set. Select the correct choice below and fill in any answer boxes within your choice. O A. There are infinitely many solutions. The solution set is (x,y,z) | ( x + + Z = 4}. O B. There are infinitely many solutions. The solution set is [ x is any real number} . O C. There is one solution. The solution set is O D. The solution set is the empty set