How Was the Blade-Core Method, Which Characterizes the Tools of Upper

How was the blade-core method, which characterizes the tools of Upper Paleolithic traditions, superior to Mousterian technology?

A) The Upper Paleolithic blade-core method was faster, more efficient, and more productive than previous stone tool making.
B) The Upper Paleolithic blade-core method produced sharper and longer cores than was typical of the Mousterian method.
C) The Upper Paleolithic blade-core method was faster but also more difficult to achieve, resulting in many tries that yielded no results.
D) There was no difference between the two methods-only a greater diversity of tool uses among Upper Paleolithic traditions.
E) The Upper Paleolithic blade-core method used naturally occurring metal ores to strike blades off cores.