The diagram illustrates a light source,a gas cloud,and three different lines of sight.Along which line of sight would an observer see an emission spectrum? 
Definitions:
Quantity Discounts
Price reductions given for purchasing goods in large quantities, often used by sellers to encourage bulk purchases.
Annual Volume
The total amount of something produced or processed in a year.
Line Balancing
Line balancing is the process of allocating tasks among assembly line workers or machines to ensure that each has an equal amount of work and there are minimal idle times.
Supply-Chain Management
The managing of the flow of goods and services, involving the movement and storage of raw materials, work-in-process inventory, and finished goods from point of origin to point of consumption.
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