Answer:
b. Dividing the firm's sales by the total market sales for the entire industry
Explanation:
The formula to compute the market share is shown below:
Market share = Firm sales revenue ÷ Overall market sales revenue
Let us take an example
The firm sales revenue is $100,000
And Overall market sales revenue $50,000
So, the market share would be
= $100,000 ÷ $50,000
= 2
Therefore, the most appropriate option is b.