Commodities are a. trade rules b. methods of transportation c. goods with value for trade d. coins

b

Explanation:

aug 15, 2012 - although van leeuwenhoek was not the inventor of the microscope, he advanced it more he loved to grind and focus a new lens in order to see the unseen world. most of leeuwenhoek's microscopes were silver. in a simple but significant experiment (1668), he demonstrated that worms found on

the government closely monitored its finances to avoid another financial collapse.