Modern exploration of the undersea world had its beginning in June 1943, when Jacques Cousteau . . . . . . . . his first dive with a revolutionary breathing device which he . . . . . . . . with Emile Gagnan, a French engineer.
A. was making/has developed
B. had made/will have developed
C. has made/was developing
D. will have made/develops
E. made/had developed
Answer: Option E
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