Which of the Following Best Describes a Horizontal Market

 Which of the following best describes a horizontal market? 

A)  These markets offer only specialty goods so that consumers will make a special effort to buy them.
B)  These markets offer certain products that have a limited number of buyers.
C)  These markets offer goods that are purchased by all types of firms in many different industries.
D)  These markets include only those convenience goods that are purchased frequently and with minimum effort.