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Difficulty—
Da Vinci's vision of a flying contraption was dismissed for centuries as a pipe dream; instead, many scholars attribute several critical innovations that actually led to manned flight with its principles.
A) was dismissed for centuries as a pipe dream; instead, many scholars attribute several critical innovations that actually led to manned flight with
B) had been dismissed for centuries as a pipe dream, but from which, many scholars have attributed several critical innovations that actually led to manned flight to
C) had been dismissed for centuries as a pipe dream, but from which, many scholars attribute several critical innovations that actually led to manned flight with
D) was dismissed for centuries as a pipe dream, but many scholars attribute several critical innovations that actually led to manned flight to
E) had been dismissed for centuries as a pipe dream; instead, many scholars have attributed several critical innovations that actually led to manned flight to
OA D
Source: EMPOWERgmat
A) was dismissed for centuries as a pipe dream; instead, many scholars attribute several critical innovations that actually led to manned flight with
B) had been dismissed for centuries as a pipe dream, but from which, many scholars have attributed several critical innovations that actually led to manned flight to
C) had been dismissed for centuries as a pipe dream, but from which, many scholars attribute several critical innovations that actually led to manned flight with
D) was dismissed for centuries as a pipe dream, but many scholars attribute several critical innovations that actually led to manned flight to
E) had been dismissed for centuries as a pipe dream; instead, many scholars have attributed several critical innovations that actually led to manned flight to
OA D
Source: EMPOWERgmat
