The correct responses that describe key events, values, and achievements during the time of the Roman Republic are:
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Growth in size and power after the Punic Wars - The Punic Wars significantly expanded Roman territory and influence, marking a key achievement during the Republic.
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A code of written law called the Twelve Tables - The Twelve Tables are considered one of the earliest attempts to codify Roman law and represented a significant achievement in legal development during the Republic.
The other two responses about personal wealth and power being valued more than loyalty to Rome and rule by the patrician class without plebeian representation, while they may reflect certain aspects of the socio-political dynamics of the Roman Republic, do not capture key achievements or specific defining events in the same way. While personal interests sometimes conflicted with broader loyalty to Rome, this statement is more of a general observation than a key event or achievement. Similarly, while the patrician class initially held power and plebeians had limited representation, the eventual struggle for representation (leading to the Conflict of the Orders) was a defining process that shaped the Republic rather than a static condition.