While Sales Representatives Have Traditionally Worked Alone,they Now Work More

While sales representatives have traditionally worked alone,they now work more and more in teams because:

A) teams save money for companies over individual sales representatives
B) companies cannot manage technology efficiently for individual sales representatives
C) products and services are more complex,and customers need complete solutions instead of isolated purchases
D) managers have limited time and resources,and can manage teams more efficiently than individuals
E) customers like to feel that they have multiple points of contact at a vendor company