Concept:The Rowlatt Act was passed in 1919 by the British colonial government in India.
Explanation:The Rowlatt Act, also called the Anarchical and Revolutionary Crimes Act of 1919, was passed by the Imperial Legislative Council on March 18, 1919.
It gave the government powers to arrest and imprison suspected persons without trial, and to try cases speedily.
The Act allowed indefinite detention and curbed civil liberties, so Indians called it the "Black Act".
Mahatma Gandhi launched a nationwide protest against this Act.
The protest gained momentum, but it lost force after the Jallianwala Bagh massacre on April 13, 1919.
Thus, the Rowlatt Act is historically associated with the year 1919.
Answer:The Rowlatt Act was passed in 1919. Hence, option C is correct.