No.

Tha once elected they are interested and possibly to solve the problems of the electorate from which the had the votes.

Regards

The correct answer is D. disinterested.

Breakdown of the Blank

The sentence states that people expect a certain kind of representative, and then it provides a contrasting idea: "it is considered common knowledge that politicians always have their own bent." The word "bent" here means a personal inclination or a bias.

Therefore, the blank must be filled with a word that means without personal bias or motivation.
- Disinterested: This means not influenced by considerations of personal advantage; impartial. It perfectly fits the contrast between the public's expectation of impartiality and the reality of politicians having their own agendas.

Let's look at why the other options are incorrect:
- A. rationale: This means a set of reasons or a logical basis for a course of action.
- B. competent: This means having the necessary ability, knowledge, or skill to do something successfully.
- C. flexible: This means able to be easily modified to respond to altered circumstances.
- E. caring: This means displaying kindness and concern for others.