$1.$ When is an incumbent sustaining technology most likely to be threatened by a disruptive technology?

When the incumbent technology exceeds the performance demanded by the low end of the market

When the disruptive technological innovation exceeds the performance demanded by the high end of the market

When the incumbent technology satisfies the performance demanded by the market

When the disruptive technological innovation first occurs

When the incumbent technology exceeds the performance demanded by the high end of the market. $2.$ Which of the following most accurately describes when the dominant design occurs?

After new entrants are attracted to an emerging market opportunity

Before incremental innovation occurs

When the rate of product innovation is at its highest

After a disruptive innovation occurs and a new era of ferment begins

When the rate of process innovation is at its highest $3.$ Which of the following best describes the current industry phase for exoskeletons and their use in rehabilitation and mobility assistance?

Incremental innovation

Era of ferment

Maturity

Dominant design

Developing