问题详情

Moneymarketsecuritiesare______.
A．essentiallyissuedbygovernments,financialinstitutions,andlargecorporations
B．veryliquidandearnshighreturn
C．denominatedinsmallsumssothatindividualinvestorscandealinthem
D．purchasedbyindividualinvestorsdirectly

请帮忙给出正确答案和分析，谢谢！