Identify correct statement among the following [Manipal MEE 1995]

• A. The greater the mass of a pendulum bob, the shorter is its frequency of oscillation
• B. A simple pendulum with a bob of mass M swings with an angular amplitude of \[{{40}^{o}}\]. When its angular amplitude is \[{{20}^{o}}\], the tension in the string is less than \[Mg\cos {{20}^{o}}\].
• C. As the length of a simple pendulum is increased, the maximum velocity of its bob during its oscillation will also decreases
• D. The fractional change in the time period of a pendulum on changing the temperature is independent of the length of the pendulum