Evaluate the following statements related to group 14 elements for their correctness.
(A) Covalent radius decreases down the group from to in a regular manner.
(B) Electronegativity decreases from to down the group gradually.
(C) Maximum covalance of is 4 whereas other elements can expand their covalance due to presence of d orbitals.
(D) Heavier elements do not form bonds.
(E) Carbon can exhibit negative oxidation states.
Choose the correct answer from the options given below :