Among of the following statements, choose the correct statements.

A. Polymers are high molecular weight compounds made up of small repeating units called monomers.

B. Addition polymers are formed by the condensation reaction between monomers.

C. Polymers can be classified as natural and synthetic based on their origin only.

D. The process of converting monomers to polymers is known as polymerization.

E. Thermoplastic polymers can be repeatedly softening on heating and hardening on cooling.

Choose the correct answer from the options given below;