The correct answer is - C) an increase in the quantity demanded of that product.
When a prize of a product goes down and the quality of the same remains the same, people tend to shift towards that product and start to buy that product, while in meantime leaving the products that they were buying before because they have a bigger prize. This also contributes to people buying more in quantity, and this is in case the prize of the product gets back as it was before. Since more people start to buy the product, and also buy it larger quantity, there's an increase in the demand for the particular product.
Gunpowder was invented somewhere around 900 in China.
Well, that's basically it... :P
Answer:
The tabulating machine was an electromechanical machine designed to assist in summarizing information stored on punched cards. Invented by Herman Hollerith, the machine was developed to help process data for the 1890 U.S. Census. Later models were widely used for business applications such as accounting and inventory control. It spawned a class of machines, known as unit record equipment, and the data processing industry
