Identify a true statement about sales accounts classification and resource allocation.

The proportion of unprofitable accounts is minimal; therefore, all accounts should have equal allocation of resources.

As a rule, $80$ percent of the sales in a territory come from only $20$ percent of the customers.

Salespeople should avoid classifying customers on the basis of their sales potential.

All customers have the same buying potential, just as all sales activities produce the same results.

Salespeople should maximize effort spent with the customers who offer little opportunity for profitable sales.