Choose the correct form of the word in brackets

Choose the correct form of the word in brackets:
The professor's lecture was so ______ (profound) that it left the students in deep thought for hours.
a) profoundness b) profoundly c) profound d) profundity

Choose the correct form of the word in brackets: The ______ (eradicate) of smallpox is considered one of the greatest achievements in medical history.
a) eradication b) eradicate c) eradicating d) eradicated

Choose the correct form of the word in brackets: His ______ (tenacious) in pursuing the truth eventually led to the resolution of the case.
a) tenacity b) tenacious c) tenaciously d) tenaciousness

Choose the correct form of the word in brackets: The artist's ______ (meticulous) attention to detail is evident in every stroke of the painting.
a) meticulousness b) meticulous c) meticulously d) meticulosity

Choose the correct form of the word in brackets: The ______ (contemplate) of such a complex philosophical idea requires both patience and intellect.
a) contemplation b) contemplate c) contemplating d) contemplative