It helps to understand the plot of the story
Brutus and Cassius take their own lives at the end to not be captured by the enemy, Brutus realizes that him and his servants would be captured so he convinces Strato to hold his sword as he takes his own life. Cassius knows he will be captured by Octavius and Antony, which he will then be dragged down the streets of Rome in chains. He orders Pindarus to do the same thing Strato did for Brutus.
I would say a, it shows he isn't completely coldhearted since she thought of her dad and didn't kill.
A characterization is the answer
In my judgements, leave it as it is. It sounds the best and most accurate.
