Answer:
The correct answer is option C.
Explanation:
A budget line shows the maximum possible bundles of two goods that a consumer can afford by spending his whole income. Both the axes represent two different commodities and the consumer income and price of commodities are given.
A decrease in income will decrease the purchasing power of the consumer. While the price of the two products remains the same, the consumer will be able to afford less quantity of both.
This will cause the budget line to shift inward to the left.