$1.$ A point in the manufacturing process where the demand for the company's product exceeds the ability to produce the product is known as $\_\_\_\_\_\_\_\_.$

a$.$ production bottleneck

b$.$ production shortage

c$.$ production surplus

d$.$ None of these choices are correct.

$2.$ In a production bottleneck operation, the best measure of profitability is the $\_\_\_\_\_\_\_\_.$

a$.$ number of units sold

b$.$ retail price multiplied by the number of units sold, less costs

c$.$ unit contribution margin per production bottleneck constraint

d$.$ None of these choices are correct.