Market Standards That Are Often Provided by Governments, Such as Weights

Market standards that are often provided by governments, such as weights and measures, are important to the functioning of a market economy because:

A) most people would find it difficult to figure out measures or recognize what common agricultural goods such as a tomato were otherwise worth.
B) society would quickly fall into chaos without standards of every sort, from scientific to moral standards.
C) they help people understand what they are bargaining for.
D) they help people recognize the value of public goods.