An idiom/phrase is given in bold. Following this idiom/phrase are given three sentences, which use the given idiom/phrase. The idiom/phrase may or may not be used correctly in one or more sentences. Identify the sentence(s) that use(s) the idioms/phrases incorrectly either in grammar or context and mark the answer accordingly. Prop up
I. Despite Curtis's casting of accomplished character actors, their supporting roles couldn't prop up the lead.
II. When the demand for glass dropped, Isaac borrowed money to try and prop up     his business.
III. At the root of that corruption is Pakistan's system of semi-feudal land ownership, which, ironically, the Chinese Communist Party is more than happy to prop up .