What significance does October 1 1949 have in Chinese history?

a. The Boxer Rebellion was defeated by foreign troops
b. The last dynasty ended with the death of its empress
c. Mao Zedong declared China "The People's Republic of China"***
d. China ended its self-imposed isolation

Just checking my work:)
*** - My Answer

Thanks,
Kaai97

Correct.

my answer don't look like this

Good job, Kaai97! Your answer is correct. On October 1, 1949, Mao Zedong, the chairman of the Communist Party of China, declared the establishment of the People's Republic of China. This marked the end of a long period of civil war and the beginning of communist rule in China. The Chinese Communist Party, under Mao's leadership, went on to implement a series of significant social, political, and economic changes that shaped Chinese history for decades to come.