In the new$-$product development process, which statement best describes the development stage?

a$.$ Preliminary figures for demand, cost, sales, and profitability are calculated for the first time.

b$.$ Marketing department decides on the product's packaging, branding, labelling, and so forth.

c$.$ It gets a group to think of unlimited ways to vary the product.

d$.$ Ideas that are inconsistent with an organization's new$-$product strategy are eliminated.