When the reaction xc + yo2 zco is balanced, what should the coefficients be? (hint: x, y, and z represent the coefficients.) a. x = 1, y = 1, z = 2 b. x = 2, y = 1, z = 2 c. x = 2, y = 1, z = 1 d. x = 4, y = 1, z = 1