The correct statement is All answers are correct.
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Consuls were limited to a term of 1 year: True. Roman consuls served for a single year to limit the concentration of power.
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The consuls shared the powers that the king used to have: True. Consuls were the highest elected officials in the Roman Republic and held powers that were once the prerogative of kings, such as commanding the army and presiding over the Senate.
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Consuls could not serve two terms in a row. They had to wait 10 years to run for reelection: True. This was in place to prevent any one individual from gaining too much power through consecutive terms.
Thus, collectively, all statements describe the position and powers of the Roman consul accurately.