Final answer:
The owner made a profit of $100,000 by subtracting the purchase cost ($150,000) from the selling price ($250,000).
Step-by-step explanation:
The owner of a property purchased it for $150,000 and sold it for $250,000. To calculate the profit, we subtract the cost price from the selling price. Therefore, the profit is $250,000 (selling price) - $150,000 (cost price) = $100,000. Thus, the correct option is that the owner made a profit of $100,000.