Solve the given system of equations. If the system has no solution, say that is it inconsistent. x - y = 5 3x - 6z = 21 3y+ Z = 6 Select the correct choice below and fill in any answer boxes within your choice. OA. The solution is x = y= and z = (Type integers or simplified fractions.) B. There are infinitely many solutions. Using ordered triplets, they can be expressed as {(x,y,z) | x = 0, y =, z any real number}. (Simplify your answers. Type expressions using z as the variable as needed.) C. There are infinitely many solutions. Using ordered triplets, they can be expressed as {(x,y,z) | x=| y any real number, z any real number}. (Simplify your answer. Type an expression using y and z as the variables as needed.) OD. The system in inconsistent.