Final answer:
Savings accounts are the most liquid asset among the given options. Therefore, the correct option is C.
Step-by-step explanation:
In terms of liquidity, the most liquid asset among the given options is savings accounts. Liquidity refers to how quickly a financial asset can be used to buy a good or service. While real estate, jewelry, and checking accounts can also be sold, savings accounts are the most easily accessible and can be readily used for transactions.