Final answer:
The most nearly opposite in meaning to 'deceit' is 'moral,' and to 'pious' is 'irreverent'. 'Moral' suggests honesty which is the antonym of 'deceit,' while 'irreverent' suggests a lack of respect for religious practices, opposite of the devotion implied by 'pious.'
Step-by-step explanation:
The word in the sentence, 'Choose the since their whole relationship was based on lies and ----, they broke up only after a few months.', that is required to be the most nearly opposite in meaning to 'deceit' is moral. 'Deceit' means the act of concealing or misrepresenting the truth, therefore the opposite would be something related to honesty or good ethics, which 'moral' represents.
The remaining options do not accurately provide an antonym to 'deceit': 'modesty' pertains to being unassuming in the estimation of one's abilities, 'oblivion' is the state of being unaware or unconscious of what is happening, and 'negotiation' refers to the process of discussing something to reach an agreement.
When choosing the antonym for the word 'pious' which implies devotion to religious duties and practices, the most nearly opposite in meaning would be irreverent, indicating a lack of respect for things that are generally taken seriously, including religious practices.
The other options do not represent antonyms for 'pious': 'arrogant' means having an exaggerated sense of one's own importance, 'wealthy' is having a great deal of money, assets or wealth, and 'moral' pertains to principles of right and wrong behavior.