Read the following context and choose the best option to answer the question.
Context: These healthy gains in net subscriber additions are stimulating replacement and upgrade sales . In developed markets handset purchases tended to be flat , but those consumers who did purchase dug deeper and paid out more for coveted higher - end handsets and smart - phones . " In terms of market share , Nokia has passed the 40 % threshold for the first time ( 40.3 % ) . Samsung secured second place with 15.2 % , while Motorola barely managed to keep ahead of LG with its 9.3 % versus LG 's 9.2 % , and both edged out Sony Ericsson ( 8.3 % ) . There is a distinct possibility that LG might overtake Motorola by the end of 3Q 2008 , putting Motorola into fourth place .
Question: Why are cell phone sales more predictable and substantial in developed markets ?
Options: 
A. None of the above choices .
B. Because Nokia , Samsung , and Motorola as of now only sell phones in certain regions that are more developed
C. Because some of the better phone companies have yet to come to less developed nations
D. Because people in developed countries can afford to pay more for cell phones , and do consistently


D