单项选择题
A．nothing B．around 250 thousand dollars C．one-and-a-half million dollars D．two million dollars
A．was eighty-five years old B．was a young man C．had never had children D．was a middle-aged man
A．was given to Marconi and his compatriot Braun B．was given to Marconi and his partner Braun C．was shared by Marconi and Braun D．was shared by a German scientist and an American scientist