What connection can be made between the paragraphs?

the first criticizes actions and the second gives results of the actions.
the first promotes an idea and the second makes a prediction.
the first describes a problem and the second explains a solution.
the first describes a company and the second tells how the company changed.

i think it might be d

here are the paragraphs
by 2010 the rift between book publishers and amazon. com over the price of e-books had grown. the publishing company macmillan books threatened to pull its e-books from amazon. com, which retaliated by removing all macmillan books, both printed and electronic, from the site. however, within weeks, amazon. com capitulated and allowed macmillan and other publishers to set prices of e-books.
in 2009 the company introduced its first publishing line, amazonencore, dedicated to popular self-published and out-of-print books. it also let individuals publish their own e-books. in 2011 its e-book ambitions led to the launch of amazon publishing with the intent to develop and publish its own titles. that year amazon. com announced that kindle e-books were outselling all printed books. while many book publishers continue to derive significant revenue through sales at amazon. com, the company is no longer considered by publishers merely as another bookseller. it is now also a major competitor in their industry.