They initiated the process without delay.
They did the project without delay.
The sentence “They initiated the process without delay” indicates the beginning of an action without any pause. - Option (A) “They planned the project without wasting any time” changes the meaning, as it implies planning rather than initiation of the process. - Option (C) “They carried out the process without delay” implies the process was completed, which is different from the original idea of initiation. - Option (D) “They did the project without delay” does not focus on initiation. Thus, the best replacement is “The process was initiated by them without delay” (Option B), which keeps the original meaning intact.
Applying the standard rule for converting an active sentence to its passive form, moving the object to the subject position, using the correct form of "be" plus the past participle, and introducing "by" before the original subject, produces a specific expected sentence that can then be matched against the options.
Only option B correctly applies the passive transformation while preserving the original subject, object, and verb sense.
Hence, the correct answer is Option B.