Following statements are given for DC motors(a) DC motors require less maintenance than AC motors(b) DC motors cannot provide high starting torque(c) DC motors are not suitable for very high-speed applications(d) The methods of speed control of DC motors are simpler and less expensive than those of AC motorsWhich of the following statements are correct?

• A. (a) and (c)
• B. (a) and (b)
• C. (b) and (c)
• D. (c) and (d)