Answer & Solution
Answer: Option E
Solution:
The phrase "so far succeeded in recovering" is grammatically correct and idiomatic.
"So far" means "up to this point in time" and is appropriate for indicating progress.
"Succeeded in" is the correct verb-preposition combination when followed by a gerund.
"Recovering" is the gerund form of the verb "recover," which correctly follows "succeeded in."
Therefore, the original sentence is correctly structured and does not require any correction.
Hence, Option E is the correct answer.