After World War I, there were many advances in arts and sciences. Which choice shows the correct pairing of the thinkers with their ideas?

Select one:
a. Malthus, Darwin and Watt -- sociology, evolution and industry.
b. Bismarck, Rhodes and Livingstone – the way governments negotiate, imperialize and explore
c. Whitney, Fulton and Edison -- machinery, transportation and electricity
d. ) Einstein, Freud and Picasso -- physics, psychology and art