Correct option is C
‘Acquiring’ is the correct word for the given blank.
(a)resembling: have a similar appearance to or qualities in common with (someone or something); look or seem like.
(b)vitiating: spoil or impair the quality or efficiency of.
(c) acquiring: buy or obtain (an asset or object) for oneself.
(d)adjourning: break off (a meeting, legal case, or game) with the intention of resuming it later.
(e)sobering: creating a more serious, sensible, or solemn mood.