【单选题】

According to the first paragraph, what does the study about tariff-jumping motive show
A．The welfare and strategic effects of antidumping laws under alternative market structures.

B．Industries' incentives to petition for antidumping.
C．These studies show under which conditions foreign firms prefer to set up local production units over exporting when serving distant markets.
D．The potential effect of antidumping measures in strengthening collusive practices.