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Sentence Correction: Redundancy - "as well as"

The fall of the Berlin Wall in September 1989 inspired a period of optimism in Europe and was the precursor to forging new personal relationships and forging business partnerships between East to West Germany, a healing of past traumas, and a historical reconciliation with countries emerging from former communist regimes.

Incorrect.

This answer choice is grammatically incorrect. The sentence contains a list (parallelism) where the last two items are nouns (a healing ..., a historical reconciliation) but the first items are verbs (forging).

[[snippet]]

In addition, between East to West Germany is incorrect. The correct idiom is between A and B.

Incorrect.

While this answer choice corrects the original idiom mistake, it repeats the original Parallelism mistake. The sentence contains a list (parallelism) where the last two items are nouns (a healing ..., a historical reconciliation) but the first items are verbs (forging).

[[snippet]]

Incorrect.

While this answer choice corrects the original Parallelism mistake. it is stylistically flawed. Using as well as instead of and is redundant.

What helps us identify this mistake is the following Stop Sign:

as well as

Well done!

This answer choice corrects the Parallelism mistake in the original question by changing the verb forging to a noun a forging. It corrects the idiom mistake by changing East to West Germany to East and West Germany.

This answer choice is also stylistically superior to other answer choices, as it uses forging of as the controlling part of a new parallelism: forging of (A) new personal relationships and (B) business partnerships. The resulting sentence is more concise.

Incorrect.

While this answer choice corrects the original Parallelism mistake, it repeats the original idiom mistake. The phrase between East to West Germany is incorrect. The correct idiom is between A and B.

In addition, this answer choice is stylistically flawed, as using along with instead of and is redundant and awkward.

forging new personal relationships and forging business partnerships between East to West Germany
forging new personal relationships and forging business partnerships between East and West Germany
a forging of new personal relationships as well as business partnerships between East Germany and West
a forging of new personal relationships and business partnerships between East and West Germany
a forging of new personal relationships along with business partnerships between East to West Germany