Which of the following techniques for measuring public opinion requires careful question
design?

Iwould say a, due to the fact these routes display many things that would be useful and provide explanations for how states are known.

The  most important advantage  of  northeast china  that  mainly contributed toward its being  the  industrialand  technological center  of the  country  in the  1970s  and  1980s  is:   its  juxtaposition with china's  most important industrial  neighbors.

The last was china on dec 8 1941