It should be D. The US's bombing and invasion of Cambodia
Answer: The Communists gained control of mainland China and established the People's Republic of China (PRC) in 1949, forcing the leadership of the Republic of China to retreat to the island of Taiwan.
Explanation: The Long March was when Mao and his 100,000 followers fled to Guomindang and they trekked 6,000 miles and they faced daily attacks. Out of the 100,000 followers only 20,000 survived. The Long March was a symbol of Communist heroism and the march attracted many more followers to Mao.
Indus valley situated between India and Pakistan.
Akbar was a) a Mughal ruler of India who practiced religious and cultural tolerance. The Mughal Empire was an empire that extended over the Indian subcontinent (India, Pakistan, Bangladesh, Nepal, Sri Lanka, Bhutan and the Maldives). Akbar was seen as one of the greatest rulers in the Mughal Dynasty and ruled until his death in 1605. He was not particularly interested in religious orthodoxy and preferred a united empire, regardless of religion and was a big "patron" of culture.