These following sentences are true EXCEPT _______.

A In the early 1950s anyone who wanted to dive could be professionally trained.

B In the early 1950s there were no training courses available to civilians who bought the first scuba equipment.

C As recreational diving became more popular, manufacturers have made more and more diving equipment. In the early 1950s anyone who wanted to dive could be professionally trained.

D Advances in scuba technology encourage more and more people to train and use it.