ANSWER :
D. Converted into country's medium of exchange determines liquidity of the asset
EXPLANATION :
Liquidity is trait of an asset which refers to its ease of being used as a 'medium of exchange' , 'purchasing power tool' . Ex : Monetary currency being legal tender money (i.e legally bound to be accepted) is the most liquid asset . Cheqeuable deposits , plastic money are also relatively liquid . But : Land / Financial Shares might be not that easily convertible into a form of money which can be used as a 'medium of exchange' , ,purchasing power tool'