What is the most extensive United front in the new period?

A: During the first cooperation between the two countries, the Revolutionary United Front was established to overthrow the warlords.

B is the political line and basic strategy formulated by China Producers Party to unite all anti-Japanese forces of all ethnic groups and defeat the Japanese aggressors.

(3) The patriotic United Front refers to a broad political alliance led by the Chinese Production Party and attended by all democratic parties, including socialist workers, patriots who support socialism, patriots who support the reunification of the motherland and builders of the socialist cause. It includes two alliances: one is a political alliance composed of all socialist workers and patriots who support socialism in Chinese mainland; Second, a political alliance based on extensive solidarity with compatriots in Taiwan Province Province, Hong Kong, Macao and overseas Chinese to support the reunification of the motherland.

D In order to overthrow Chiang Kai-shek's reactionary regime and establish a new China, the leaders of the China Communist Party established a broad people's democratic United front, including workers, peasants, urban petty bourgeoisie, national bourgeoisie, democratic parties, enlightened gentlemen, other patriots, compatriots from ethnic minorities and overseas Chinese.

A and d are easy to rule out. Second, the anti-Japanese forces in the United Nations, and second, the patriotic forces at home and abroad.