Answer: low productivity of workers in Bangladesh in industries other than those that produce clothing for exports( Option D).
Step-by-step explanation:
The growth of clothing exports originating in Bangladesh came into place due to the low productivity of the employees in other industries in Bangladesh apart from the industries that deal with exportation of clothing.
Since other companies are not as productive as the clothing industry, the right thing to do is to export clothes which is more productive. This shows that there's comparative advantage in clothing compared to other industries. Hence, when trading with other countries, clothes should be used as exports since there'll be more output to trade.