Final answer:
Julius Caesar was the first person known to write about Britain around 55 BC, documenting his attempted conquest and observations of the British Isles in his writings while claiming victory over the channel crossing (option c) .
Step-by-step explanation:
The first person to ever write about Britain was Julius Caesar around 55 BC. Caesar attempted to conquer Britain for the Roman Empire during his military campaigns. He faced resistance from the ferocious local tribes but claimed victory after successfully crossing the English Channel. Despite the initial troubles, Caesar documented his experiences, including the geography and the interactions with the native tribes, in his writings which include Commentarii de Bello Gallico.
After his expeditions, Caesar continued to pursue his political and military objectives, furthering the Roman expansion and consolidation of territories across Europe. His writings provide valuable insights into the early history of Britain and its relationship with the Roman Empire before it became more thoroughly integrated into the empire under the rule of Emperor Claudius in 43 CE.