What's the economists' attitude towards the protection activities?

A、The protectionism is growing fiercer and fiercer.;
B、The ever-growing protectionism will lead to a broad retreat from globalism.;
C、No matter how fierce the protectionism looks like, many of the countries have to honor their commitments lower tariffs and remove quotas.;
D、The Bush government should cease the 30 percent tariffs imposed on some categories of imported steel.