He failed to savvy the full implications of the agreement that he had signed.

Answer: Option C

Remember : have in or be able to bring to one's mind an awareness of (someone or something from the past).
Memorise : commit to memory; learn by heart.
Understand : perceive the intended meaning of (words, a language, or a speaker).
Taste : the sensation of flavour perceived in the mouth and throat on contact with a substance.
Savvy : know or understand.

Synonym of Savvy is Understand