Concept:The Mahdiyya Movement began when Muhammad Ahmad bin Abd Allah declared himself the Mahdi, the awaited Islamic redeemer.
Explanation:Muhammad Ahmad made this declaration in
1881.
That was the actual starting point of the Mahdiyya Movement.
The capture of Khartoum occurred later in
1885, so
1885 marks the movement’s peak, not its beginning.
Hence, the correct historical year is
1881.
Since
1881 is not included among the options given, the options contain an error.
Answer:The Mahdiyya Movement began with the declaration of the Mahdi in
1881; none of the listed options is correct.