When Mechanical Gas Pumps First Appeared in the United States

When mechanical gas pumps first appeared in the United States in the 1930s,their spinning dials couldn't register sales beyond $99.99.Today,some stations still use the retro pumps,but the limited dials cannot register the sales of higher-priced gas,which often mount about $100 for SUVs.The pumps can be modernized for about $650,but the company that provides this service has a huge backlog.This is an example of how _____ factors affect small convenience stores and service stations.

A) technological and cultural
B) competitive and natural
C) technological and economic
D) cultural and economic
E) demographic and marketing mix