Fair and （） competition in government procurement around the world is good business and  good public policy.Competitive pricing,product （） and performance improvements result from competitive practices and help ensure that government authorities get the best （） for the public they serve.

And help ensure that government authorities get the best （） for the public they serve.

A.help

B.server

C.value

D.policy

世贸组织的协定、协议与其国内法处于不平等的地位。