What can be inferred about a person with "rancor"?

The choice indicating that a person harbors bitter resentment is correct because the term "rancor" is defined as a feeling of deep-seated bitterness or enmity. This suggests that someone with rancor holds onto negative feelings, often due to past wrongs or grievances. The emotional state associated with rancor is typically intense and negative, reflecting a lack of forgiveness and an inability to move past perceived injustices.

The other options do not align with the definition of rancor. For example, being forgiving and understanding would imply the absence of resentment, making that choice incompatible with the concept of rancor. Indifference suggests a lack of strong feelings altogether, rather than the active bitterness that rancor implies. Lastly, the notion of always being cheerful contradicts the negative connotation of rancor, as bitterness and cheerfulness cannot coexist effectively.