They used hard stone tools to work softer into softer sculptures like limestone.
The 25th President of the United States was William McKinley.
McKinley serves from 1897 until his death by assassination in 1901.
McKinley was a Republican who supported America's new Imperial efforts. He was assassinated by Polish-American anarchist Leon Czolgosz and was succeeded as President by his Vice-President, Theodore Roosevelt.
I wanna say it's D but I'm not sure.
Rivers provides transportation routes is the most common eco system