Answer:
Among the options given below,the correct answer is option D.
when people have trouble supplying the goods and services at current prices.
Explanation: Shortage is a economical condition where the demand of a goods or service more than the supply. There are many reasons behind occurring shortage. Among the causes one of the major cause is when the people have trouble supplying the goods and services at current price.
For example, if a clothing company gives the 40% sales on a attractive product ,people will try to buy this clothing product. But when the number of customer will exceed the number of the product available for the discount,will make a shortage. Because the sellers will not be able to supply more products on the same price.
So a shortage will occur in the market.