Answer: The Communist Party
Explanation: The Communist Party departs in a straight line from the workers' and socialist movement which has thus taken advantage of the teachings of earlier agitations.
In order to effectively wage the struggles it wished to display against the ruling capitalist class, it had to wage a fight against opportunism and the politics of class collaboration.
At the same time, he had to overcome these childhood illnesses that are leftism and sectarianism. Lenin and the Communist International gave her precious help.