Thorton Is an Employee of Chapta,a Major Manufacturer of Modular

Thorton is an employee of Chapta,a major manufacturer of modular furniture.Over the past months,sales have been down a bit and Thorton has been questioned by his manager as to why.Thorton was made aware that there were problems with the shipment of lumber received which was used in the manufacturing of the last eight runs of furniture.Thorton did not sufficiently check the material until it was already used in production.Though he suspects that the decline in sales is connected to current customer complaints,Thorton tells his manager that there has been an industry wide reduction in sales.Which of the conventional levels of justification do you see Thorton is using? Support your answer.