What strategy was avon pursuing until the mid-2000s? what were the advantages of this strategy? what were the disadvantages?

Avon used Direct Sales Model Strategy until the mid-2000s. It is a method wherein the business's own employees are in direct contact with buyers as they sell their products. 

The advantages of direct sales model are:
1) strong customer relations
2) coordination with other effective business strategies
3) price and cost control
4) access to more customers

The disadvantages of direct sales model are:
1) more expensive compared to other marketing strategy
2) time consuming during sales calls or talks.
3) can be inconvenient or intrusive to clients or consumers.

The answer is a. i think