The diffusion of innovation theory focuses on
a. the geographic boundaries of innovation.
b. the relationship between pioneer brands and imitators.
c. the psychological traits of innovators.
d. the rate at which consumers are likely to adopt a new product or service.
e. the way a product moves through the product life cycle.

d. the rate at which consumers are likely to adopt a new product or service.

Explanation:

Diffusion theory tends to describe that how, why and at what rate does now ideas and technology spreads. This theory is mainly focused on human capital and cannot function without it.

New ideas and technology cannot be spread until people adopt them. Therefore the focus of this theory remains at the rate at which consumers are likely to adopt a new product or service.

answer/// equals both average variable cost and average total cost at their respective minimums;