【单选题】The “monkey wrench” in the “Complex global supply chains crisscross the world, making discrimination on the basis of nationality a throwback to another age and a monkey wrench in the machinery of mode...
A.
The discrimination on the basis of nationality will be of some help to the modern global commerce.
B.
The discrimination on the basis of nationality will greatly boost the modern global commerce.
C.
The discrimination on the basis of nationality will be a hindrance to the system of modern global commerce.
D.
The discrimination on the basis of nationality will completely destroy the system of modern global commerce.