In marketing era 3.0, which following statement about consumers is true?

A、Consumers'judgmentonthevalueofenterprises,productsandservicesisgraduallystrong.
B、Consumersareregardedasonlybuyersandusers.
C、Consumersdonotneedtounderstandthevalueofproducts.
D、Consumersdonothaveopportunitiestoparticipateinmarketingprocess.