Among the Conclusions of Chapter Eight's Survey of the Evidence

Among the conclusions of Chapter Eight's survey of the evidence on international technology transfers is that:

A) the volume of bilateral trade is not able to explain any part of the variation in bilateral technology flows.
B) the overall rate of diffusion has decreased markedly since World War II.
C) developed economies absorb less foreign technology than developing economies.
D) All of the above.
E) None of the above.