On a supply and demand graph, supply will decrease and shift to the left when which of the following happens?
A
The number of firms leaving the industry increases.
There are fewer government regulations in place.
B
С
The total cost of inputs decreases.
Production taxes decline over a short period of time.
D

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Explanation:

sorry po kaylangan ko kasi mag answer para maka ask ng question sorry po hindi ko Alam ang answer

Option A

The number of firms leaving the industry increases.

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answer:

d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.