In the given instance, the chemicals are being distributed to Caruthers through Direct distribution channels.
Explanation:
The supply chain strategy in which the end products are delivered or supplied directly from producer or manufacturer to end consumer or consumer without any intermediaries (like wholesalers, retailers or agents). In this the manufacturer or the producer would take the products to the consumers place by their own transport and logistics network.
Here, the Caruthers Paint Manufacturing Company gets the required materials from Roth Chemicals to produce its products. So, in this instance the producer or the manufacturer is Roth Chemicals and the consumer is Caruthers Paint Manufacturing Company and the supply chain strategy used is direct distribution.