The key competing factors that are mapped in the industry's $\text{'}$as is$\text{'}$ value curve are.......

a$.$

The key value factors for buyers in making their purchase decision

b$.$

The areas that firms in an industry have historically focussed on and invested in as they compete with each other

c$.$

The different products and product features offered by the firm

d$.$

The competencies possessed by the firm