Concept testing is distinct from concept selection in that it is based on and relies to a lesser degree on

a$)$ data gathered directly from customers; judgements made by senior managers

b$)$

c$)$ data gathered directly from potential customers; judgements made by the development team

$$

$$ s

b$)$

$q,$ judgements made by the senior managers; data gathered directly from customers

$$ d$)$ judgements made by the development team; data gathered directly from potential customers