Read the passage. John D. Rockefeller was an American industrialist.
He eventually became the owner of the Standard Oil
Company and formed a near monopoly. At one point
he owned roughly 95 percent of the country's oil
refining businesses.

What effect did Rockefeller’s business practice on customers

A) consumer paid higher prices

B) consumer had more product options

C)consumer enjoyed better-quality products

D) consumers became more loyal to the company