When Microwave Ovens Were Originally Introduced,they Posed a Potential Threat

Multiple Choice

When microwave ovens were originally introduced,they posed a potential threat to the producers of conventional ovens.Over several decades,the effect of microwaves on the sales of conventional ovens has been minimal;in fact,most homes today utilize both appliances.Also,technology has not advanced much in this area and industry profits are flat.Based on this information

A) the threat of new entrants for either type of oven is high.
B) the threat of competitive rivalry for either type of oven is high.
C) the threat of new entrants for either type of oven is low.
D) the threat of substitutes for either type of oven is high.
E) the regulatory influence on these ovens is high and changing.