Since Ivan's invention was not adopted by his target customers, the reason for the failure was because of lack of technological feasibility.
Basically, a technological feasibility refers to the act of figuring out how one is going to produce their technological product which will be acceptable by target population.
Hence, since he is producing a power electrical devices and his invention was not adopted by his target customers, the reason for the failure was because of lack of technological feasibility.
Therefore, the Option B is correct.
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