单项选择题

Amazon today unveiled Dash Buttons, an easy way for customers to 1 select bulk goods 2 an internet-connected button, and yesterday 3 Home Services, an on-demand installation and handyman service. Combined, they show that the e-commerce giant has a clear understanding of how the Internet-of-things will 4 its business. And it isn"t going to be shy about capitalizing on connectivity to build its bottom line. Dash Buttons are an adaptation of Amazon"s 5 -controlled Dash ordering system that lets people speak to order new 6 items.
So 7 Amazon has is a retrofit strategy for connecting smart appliances to its e-commerce operations and a future-facing strategy for the coming flood of 8 devices. And all of this is geared around making buying products from Amazon as easy as possible.
The 9 of one-button tasks are appealing, 10 it could lead to a 11 of packages ending up at people"s doors if Amazon doesn"t try to 12 waste on its end, by grouping shipments together when possible. People on Twitter seem mostly 13 about pets and small children playing with the Dash Buttons and ordering multiples of their Kraft Macaroni and Cheese boxes, although Amazon notes that 14 the button is pressed more than once, the order doesn"t go 15 on the second time, and you"ll get a smartpbone notification about it.
Amazon also recently launched Home Services, following up on last year"s opening of a home automation e-store devoted to connected gadgets for the home—many of which require a 16 in staller. So now Amazon can sell these devices along with the person who can install them. It also is 17 on maintenance, via a network of service providers that it can call 18 for its network of suppliers or for its own planned connected home play.
With Dash, it"s 19 an offensive play to 20 up more sales as devices come online. With Amazon Home Services, it"s making a defensive play as other large companies try to become more vertically integrated.

A.uncertainty
B.complexity
C.creativity
D.simplicity
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