Which of the following is true regarding supply of a commodity?

(A) Technological progress leads to a decrease in the supply of a commodity.

(B) When the price of inputs rises, the supply curve of the good shifts to the left.

(C) Technological progress shifts the supply curve of the firm to the right.

(D) Imposition of a unit tax on a firm shifts the supply curve of the goods produced by the firm to the left.

Choose the correct answer from the options given below:

(A) Technological progress leads to a decrease in the supply of a commodity -> FALSE. Technological progress improves production efficiency and reduces costs, leading to an INCREASE in supply, not a decrease.

(B) When the price of inputs rises, the supply curve of the good shifts to the left -> TRUE. Higher input prices raise production costs, making it less profitable to produce, thus decreasing supply.

(C) Technological progress shifts the supply curve of the firm to the right -> TRUE. Better technology allows firms to produce more efficiently at lower costs, increasing supply at every price level.

(D) Imposition of a unit tax on a firm shifts the supply curve of the goods produced by the firm to the left -> TRUE. A tax increases per-unit costs, reducing profitability and causing firms to supply less at each price.

Hence, Option 4: (B), (C) and (D) only -> Statement (A) is incorrect because technological progress increases supply, not decreases it. Statements (B), (C), and (D) are all correct as they accurately describe how input prices, technology, and taxes affect supply curves. Higher costs (from input prices or taxes) shift supply left, while improved technology shifts supply right -> correct