According to course materials, why is B2B ecommerce considered more complicated than B2C? Select more than one answer. Group of answer choicesthe B2B cost of a sale is higher than the B2C cost of a salea B2B purchase has a longer lasting impact than that of a B2C purchase (usually larger in scope and higher in value)B2B purchasers have more in-depth knowledge of products and services than individual B2C purchasersthe B2B consumer must prove a return on investment