35. By 1940, the pilot Jacqueline Cochran held seventeen official national and international speed records, and she earned them at a time when aviation was still so new for many of the planes she flew to be of dangerously experimental design.
(A) and she earned them at a time when aviation was still so new for many of the planes she flew to be
(B) earning them at a time that aviation was still so new for many of the planes she flew to be
(C) earning these at a time where aviation was still so new that many of the planes she flew were
(D) earned at a time in which aviation was still so new such that many of the planes she flew were
(E) earned at a time when aviation was still so new that many of the planes she flew were