Answer:
(D) The average productivity of the workers in the country has not risen.
Step-by-step explanation:
The main reason is that wages are influenced by average productivity in the country's economy. In a developing average productivity is not increasing due lower levels of education, poor infrastructure and little technological advancements. Advanced technology is being transferred ever more speedily across borders, but even with the latest technology, productivity and wages in developing countries will remain lower than in developed countries for many years because developed countries have better infrastructure and better-educated workers.