Final answer:
The main objective of Brian Duke is 2) to reduce the cost of teabag manufacturing.
Step-by-step explanation:
The main objective of Brian Duke in this scenario is to reduce the cost of teabag manufacturing.
By working with an outside company to find a more efficient way to manufacture teabags, Duke aims to lower the expenses involved in the production process.
This could be achieved through various means, such as optimizing the use of resources, implementing automation technologies, or streamlining the manufacturing process.