Which of These Companies Has Adopted Unethical Practices

Which of these companies has adopted unethical practices?

A) Gemini Inc. ceased its operations in some developing nations on account of low employment standards in those countries.
B) ModernMeds Corp. sells its medicines at a lower price in less developed nations.
C) Capricorn Inc., a multinational company operating in developing nations, pays its labor 30 percent more than what the local competitors pay.
D) Centaur Inc. closed down a production plant as the local management there employed child labor.
E) ClearLand Inc. sends its waste products for disposal to a developing nation because the pollution control laws in its home country are stricter than those in the developing nation.