Answer:
Option (a) is correct.
Step-by-step explanation:
When the government of United states provide subsidy to the Tobacco industries then there is a rise in the production of Tobacco because it will become cheaper for the firms to produce tobacco.
But these firms are not taking the proper steps for health related issues and even lobbying from health-related concerns.
If the congress repeals the tobacco firms subsidies then the cost of tobacco production increases because of the withdrawal of subsidies. Hence, the supply of tobacco decreases because of the lower level of output and therefore, this would shift the supply curve of tobacco firms leftwards.
This is only because of the higher cost of production.