Gradual "rollouts" are characteristic of which step of the new-product development process? idea generation development idea screening idea evaluation commercialization

The answer is commercialization

Gradual "rollouts" are characteristic of commercialization process. Commercialization process involves the introduction of a new product or production method into commerce, making it available on the market. It is a stage-wise process, and each stage has its own key goals and milestones.

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.