With which of the following generalizations regarding management structures would the author of the passage most probably agree?A．Hierarchical management structures are the most efficient management structures possible in a modern context.B．Firms that routinely have a high volume of business transactions find it necessary to adopt hierarchical managemnt structures.C．Hierarchical management structures cannot be successfully implemented without modern communications and transportation.D．Modern multinational firms with a relatively small volume of business transactions usually do not have hierarchically organized managemnt structures.E．Companies that adopt hierarchical management structures usually do so in order to facilitate expansion into foreign trade.