When is an incumbent sustaining technology most likely to be threatened by a disruptive technology?

o When the incumbent technology exceeds the performance demanded by the high end of the market
o When the disruptive technological innovation first occurs
o When the incumbent technology satisfies the performance demanded by the market
o When the incumbent technology exceeds the performance demanded by the low end of the market
o When the disruptive technological innovation exceeds the performance demanded by the high end of the market