Which of the Following Statements Is Correct

Which of the following statements is correct?

A) The winner will get his costs paid for by the loser.
B) The court has a general discretion to make an award of costs between the parties where the claim is discontinued by the Claimant.
C) The court has no discretion when awarding costs where a valid Part 36 offer has been accepted with the relevant period.
D) The parties' pre-action conduct is not taken into account when assessing costs.