d$.$ They are easy to develop and present.

$5.$ What strategic options are relevant to companies once they have developed their customer portfolio analysis?

a$.$ Grow business with the customer, reconfigure how to do business with the customer, retain the customer, terminate the customer.

b$.$ Grow business with the customer, reconfigure how to do business with the customer, retain the customer, refer the customer to competitors.

c$.$ Grow business with the customer, develop strategic partnerships, retain the customer, terminate the customer.

d$.$ Expand business with the customer, realign how to do business with the customer, retain the customer, adapt to the customer.