Julius Caesar a. was a member of the plebeian class. b. defeated Octavian's army and obtained the titles of dictator, then dictator for life. c. saw the need for change and strengthened the Senate's power. d. was assassinated by leading senators convinced his death would restore the republic. e. was defeated by Pompey after he crossed the Rubicon.

d. was assassinated by leading senators convinced his death would restore the republic.

Explanation:

Julius Caesar had the title of "dictator for life" by the time he was assassinated by three senators:  Marcus Junius Brutus, Cassius Longinus and Decimus Junius Brutus in 44 BC. He was stabbed to death in a theater, and several other senators were conspirators.

The goal of the senators was to re-establish the republic, however, they were ineffective in achieving this goal, and what broke out next was a civil war that ended when Augustus finally took power and became the first Roman Emperor.