Answer:
B. Acting as a watchdog.
Step-by-step explanation:
B. Acting as a watchdog.
Acting as a watchdog is a key role of a political party, as it involves criticizing the party in power and offering their own solutions to political problems. This is done in order to ensure that the government is accountable to the public and that it is managing the country in a responsible and effective manner.
The other party roles of informing citizens, helping manage government, and linking the different levels of government involve providing information, facilitating government operations, and connecting different levels of government, respectively. They do not involve criticizing the party in power or offering their own solutions to political problems.