The correct answer is C. Froebel.
Friedrich Wilhelm Froebel (1782-1852) was a German educator who developed the kindergarten system of education. He believed that children learn best through play and interaction with their environment. He also believed that education should be child-centered and focus on the development of the whole child.
T. P. Nunn (1829-1901) was a British philosopher and educationist. He was a professor of education at the University of London from 1887 to 1901. He is best known for his work on the philosophy of education.
Herbert Spencer (1820-1903) was an English philosopher, biologist, sociologist, and political theorist. He is best known for his work on social Darwinism.
Maria Montessori (1870-1952) was an Italian physician and educator. She developed the Montessori method of education, which is based on the belief that children learn best through hands-on experience and interaction with their environment.