Final answer:
The markup price after a 25% increase on the original cost c is represented by the expression 1.25c.
Step-by-step explanation:
If Cane buys candy at a certain cost, represented by c, and sells it at a 25% markup, the markup price would be calculated by adding 25% of the original cost to the original cost itself. This can be represented by the expression 1.25c, where c is the original cost of the candy. Therefore, the correct expression representing the markup price is 1.25c, which means option A) 1.25c is the correct answer.