Identify and define the concepts described in the following scenarios: 1.1 A common law defense protecting employers from liability due to co-worker negligence. 1.2 The quality of being perceptible by

1.1 The correct option is d).
The fellow servant rule was a common law defense that protected employers from liability if an employee's injury was caused by the negligence of a co-worker.

1.2 The correct option is a).
Tangibility refers to the quality of being perceptible by touch or having a physical form. If a material has mass and physical contact can be made, it is tangible.

1.3 The correct option is d).
Mass processes are characterized by high volume and low variety, focusing on the continuous and efficient flow of large quantities of products or services.