Why Are Market or Industry-Based Salesforce Structures Gaining Popularity in Today's

Why are market or industry-based salesforce structures gaining popularity in today's competitive selling environment?

A) Being conversant with one industry or market allows sales reps to "specialize" and offer better solutions to customers.
B) Customers have demanded this type of sales structure due to historically poor track records of geographically based salesforces.
C) They are easier and less time intensive for sales management to administer.
D) They are less expensive to organize than traditional geographical-based structures.