The correct answer is A (-$5).

Explanation: The value of the call option to the call seller at expiration is determined by the payoff formula for the seller, which is:

$\text{Payoff} = -\max(0, S_T - X)$

Where:

• $S_T$ is the price of the underlying at expiration ($30).
• $X$ is the strike price ($25).

Substituting the values:

$\text{Payoff} = -\max(0, 30 - 25) = -\max(0, 5) = -5$

Thus, the call seller's payoff is -$5, which matches option A. Options B and C are incorrect because they either ignore the payoff formula or incorrectly incorporate the option premium into the calculation of the call seller's value at expiration.