Problem- Which of the following is a partial explanation for the large number of compounds of carbon that are known?

A) Carbon can form covalent bonds which do not have lone pairs or unfilled orbitals available for reaction.

B) Carbon is strongly electronegative and can thus form stable covalent compounds with electronegative elements such as nitrogen, oxygen, and fluorine

C) Carbon can readily expand its valence shell to accommodate more than eight electrons and thus form double and triple bonds.

D) Carbon can form strong ionic bonds with all elements.

Using textbook reference solve the reactions given in above problem