What were the artists of ashcan school of art best known for?
a- compiling artwork into book form
b- working exclusively in photography
c- showing urban life in a realistic manner
d- concluding the superiority of the laws of nature

The correct answer here is option C.

Explanation:

The Ashcan School was an artistic movement which gained popularity as they depicted urban life in realistic manner and their most famous works portray the city of New York and its poorer neighborhoods.  Their work is known for realistic portrayal of the city's poor. Some of the most notable members are Robert Henri, John French Sloan, George Luks and Theresa Bernstein.

c. the king has significantly abused the colonists' rights many times over a long period of time.