(A) 15
(B) 20
(C) 30
(D) ** 25
EXPLANATIONS BELOW
Concept note-1: -William McKinley (January 29, 1843 – September 14, 1901) was the 25th president of the United States, serving from 1897 until his assassination in 1901.
Concept note-2: -William McKinley was the 25th President of the United States, serving from March 4, 1897, until his assassination on September 14, 1901, after leading the nation to victory in the Spanish-American War and raising protective tariffs to promote American industry.
Concept note-3: -With the assassination of President William McKinley, Theodore Roosevelt, not quite 43, became the 26th and youngest President in the Nation’s history (1901-1909).
Concept note-4: -McKinley died on September 14 of gangrene caused by the wounds. He was the third American president to be assassinated, following Abraham Lincoln in 1865 and James A. Garfield in 1881.
Concept note-5: -The 25th United States president, McKinley took office following the 1896 presidential election, in which he defeated Democrat William Jennings Bryan.