In the customer development model, Discovery refers to identifying the start$-$up$$s potential customers, while Validation

involves working with a set of leading customers to develop $($and$,$ if necessary, repurpose$)$ the product application

results in the minimal viable product or MVP

builds on the success of the start$-$up$$s firstsale and uses the first customer$($s$)$ as a reference to expand the customer base

a and b only

b and c only