I think it's A but here's an explanation anyway: as you heat the crude oil, the different hydrocarbons, having different boiling points, boil and evaporate up the column. Those with lower boiling points, shorter in chain length, will condense nearer the top of the fractional distillation column. Those that are more viscous, larger in chain size, will have high boiling points, so will evaporate last and condense lower down in the column. Therefore, you achieve all the different oils / materials (oil, petrol, gasoline, tar etc etc). I hope this helps. If not, then a good website to use is 'BBC bitesize, fractional distillation'.
The geography of a territory can impact the climate and atmosphere. Geology is the help of a territory. In the event that a zone is near a waterway it will in general make milder atmospheres. Precipitous regions will in general have increasingly extraordinary climate since it goes about as a hindrance to air developments and dampness.
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A public service is a service intended to serve all members of a community. Public services include services provided by a government to people living within its jurisdiction, either directly through public sector agencies or by financing provision of services by private businesses or voluntary organizations.
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It allowed land-grant colleges to perform experiments in the fields of rural farms.
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"Enclosure” refers to the consolidation of land, usually for the stated purpose of making it more productive. The British Enclosure Acts removed the prior rights of local people to rural land they had often used for generations.
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