单项选择题

The Industrial Revolution marked a major turning point in humans" relationship with their environment. It 1 changed every aspect of human life and lifestyles. The 2 on the world"s psyche would not 3 much attention till the early 1960s. From human development, health and life longevity to public health, energy usage and sanitation, the effects were 4 .
It wasn"t 5 the Industrial Revolution became an irresistible force overnight. It started in the mid-1700s in Great Britain when machinery began to replace manual labor. Fossil fuels replaced wind, water and wood, used 6 for the manufacture of textiles and the development of iron making processes. The full impact would not begin to be realized until about 100 years later in the 1800s, 7 the use of machines to replace human labor spread throughout Europe and North America. This transformation is 8 as the industrialization of the world. These processes 9 sweeping increases in production capacity and were to affect all basic human needs. Not only did society develop the 10 to have more things faster, but it would be able to develop better things. These industrialization processes continue today and are likely to be long-lasting.

A.when
B.which
C.where
D.that