Identify the segment in the sentence, which contains the grammatical error.
The files you were look for are placed on the table.

Correct option is B

The segment "you were look for" contains the grammatical error.
· The correct form should be "you were looking for," using the gerund form "looking" to match the past continuous tense implied by "were."
· Grammatical rule: In English, continuous tenses require the verb to be in the present participle form (-ing).
· Example: The keys you were looking for were on the desk, similarly using the present participle to indicate ongoing action in the past.
· Correct Sentence: The files you were looking for are placed on the table.