Final answer:
A key characteristic of a true democracy is individual liberty, written constitutions, majority rule with minority rights, and free elections. Competing political parties are not a key characteristic.
Step-by-step explanation:
A key characteristic of a true democracy is that it allows for individual liberty where citizens have the freedom to express their opinions and make choices without government interference. In a true democracy, written constitutions help establish and outline the rights and responsibilities of the government and its citizens.
Additionally, majority rule with minority rights is an important characteristic of a true democracy. This means that the decisions made by the majority are respected, but measures are also in place to protect the rights of minorities.
Free and fair elections, through which citizens can choose their representatives, are another key aspect of a true democracy. Competing political parties provide different viewpoints and options for voters, promoting a more diverse and robust democratic process.
Therefore, the correct answer is E. Competing political parties.