Final answer:
The Gulf Stream plays a key role in Western Europe's climate, providing a temperate climate for countries like the UK. It is suggested that a weakening of the Gulf Stream due to climate change would result in cooling in London.
This correct answer is A.
Step-by-step explanation:
The Gulf Stream is a warm ocean current that plays a crucial role in Western Europe's climate.
It brings warm water from the Gulf of Mexico to the shores of Europe, resulting in a temperate climate for countries like the UK.
Some models of climate change suggest that the Gulf Stream may weaken as global temperatures increase.
If this happens, it would most likely result in cooling in London because the absence of the warm water brought by the Gulf Stream would lead to cooler temperatures in the region.
This correct answer is A.