The answer is:
First, Octavius and Mark Antony's conflict exhibits Mark Antony's intensifying vanity. For example, when his determination that Lepidus is unsuitable of his position, it creates a dissent between Octavius and Mark Antony, which advances through the play and leads to the final fall of the Roman Republic.
As regards Brutus and Cassius' distinct integrity values, Brutus blames Cassius for taking bribes and doubts whether Caesar's death was ineffective. Their rivalry also emphasizes the ruin of their friendship, a central archetype of the Roman Republic.
Octavius and Mark Antony's conflict shows the breakdown of their strong friendship; Brutus and Cassius' conflict shows their similar values and how that can strengthen the Republic's ideal of friendship.
In Shakespeare's "Julius Caesar," after Caesar is assassinated and Rome is left without a leader, the protagonist's adopted son Octavius and Mark Antony's relationship becomes tense during the fight with Brutus and Cassius' army. On the other hand, Brutus and Cassius' friendship becomes stronger in battle, with Brutus exhibiting great unhappiness due to his friend's death.
B.) Octavius and Mark Antony’s conflict shows the breakdown of their strong friendship; Brutus and Cassius’ conflict shows their similar values and how that can strengthen the Republic’s ideal of friendship.
The contentions among Octavius and Mark Antony just as Brutus and Cassius in act 4 of The Tragedy of Julius Caesar build up the play's plot by foreshadowing the future contradiction with respect to Rome's authority; Brutus and Cassius' contention demonstrates the distinction in qualities just as the weakening of the Republic's optimal of companionship.