The author's attitude toward most European historians who have studied the Saint-Simonians is primarily one of______.
A．approval of the specific focus of their research B．disapproval of their lack of attention to the issue that absorbed most of the Saint-Simonians' energy after 1832 C．approval of their general focus on social conditions D．disapproval of their lack of attention to links between the Saint-Simonians and their American counterparts