Read the text about BASE jumping and choose the correct answers (a-c) to complete gaps 1-5 (Đọc văn bản về nhảy BASE và chọn câu trả lời đúng (a-c) để hoàn thành khoảng trống 1-5)

BASE jumping is an extreme sport. It is (1) to skydiving, but there are important differences. Firstly, the jumps are much lower - usually no more than six hundred metres. And secondly, there is no aircraft. (2), participants jump from some kind of bridge, building or cliff. The first BASE jump took (3) in 1912 in New York, when Frederick Law jumped from the Statue of Liberty. In the 1960s and 70s, the sport became more popular, partly (4) to filmmaker Carl Boenish. He made documentaries about BASE jumping and also (5) of the name. He died in 1984 while he was jumping in Norway. BASE jumping is a thrilling experience, but it is very risky too.