Final answer:
RST Insurance Company employs a direct distribution method to sell its insurance products directly to customers through various advertising media.
Step-by-step explanation:
The distribution method being used by RST Insurance Company is called direct distribution. This approach allows a company to sell its products or services directly to the customer, without the use of intermediaries such as agents or brokers. By advertising through radio ads, telemarketers, and newspaper and magazine inserts, RST Insurance Company bypasses traditional distribution channels to engage with customers directly.