A. China was not conquered by Russia during the period between 1900 and the 1911 Nationalist Revolution.
B. The neighboring provinces such as Tibet, Mongolia, and Manchuria did not become larger distinct territories in 1911. Tibet had declared independence in 1912, Mongolia declared independence in 1911, and Manchuria was divided between China and Japan in the early 20th century.
C. Korea was not divided between North and South in 1911. Korea was annexed by Japan in 1910, and it remained a Japanese colony until the end of World War II, after which it was divided into North and South.
D. The 1911 Nationalist Revolution did aim to reduce European influence, but this was not achieved immediately. The revolution overthrew the Qing dynasty and established the Republic of China, but European powers still had a significant influence on China's economy and politics for several more decades.
Therefore, the correct answer is B and D.