Final answer:
The Tel Ex jet, like the Concorde, might be expected to fly at supersonic speeds, but its success is not guaranteed due to economic factors and consumer affordability. The correct option is a.
Step-by-step explanation:
The question regarding the Tel Ex jet costing $40,000,000 and expected capabilities appears to be directly related to a business and technology context.
In reference to the fate of the Concorde, we learn that although it was once possible to build a supersonic passenger airplane, the economic viability of such transportation was not sustainable.
The information implies that sometimes technological advancements, such as supersonic travel, do not always align with practical economic realities and consumer affordability.
Therefore, while supersonic speed is enticing as a feature, other factors like cost-efficiency and accessibility may take precedence in determining the success of such a venture. The correct option is a.