Correct option is B
- The sentence begins with the fixed opening: A lot of people.
- After this, the verb phrase should come: think that (S), because it introduces a belief/opinion.
- Next, we need the subject of what they think: most newspapers (R).
- Then comes the verb phrase describing newspapers: are biased towards (Q).
- Finally, the phrase one particular (P) must directly modify political party, completing the idea.
- (a) SPQR: Places one particular too early; it cannot come immediately after people without a linking structure.
- (c) PQRS: Starts abruptly with a fragment; it does not form a grammatical continuation after A lot of people.
- (d) RQPS: Starts with most newspapers before think that, which breaks the required main clause structure.