Which of the following is true about x = 0.3 bar ? (a) x is a rational number, because x can be expressed in the form p/q by solving the equation 10x = 3 + x. (b) x is a rational number because x can be expressed in the form p/q by solving the equation 10x = 3 – x. (c) x is an irrational number because x can be expressed in the form p/q by solving the equation 10x = 3 + x. (d) x is an irrational number because x can be expressed in the form p/q by solving the equation 10x = 3 – x.