English grammar — parallel structure and tense: Choose the option that best improves the sentence. Original sentence: "He admired the speed with which he completed the work and appreciating the method adopted by him" Select the replacement for the underlined segment to make the coordination parallel.

Given data

• First verb: "admired" (past simple).
• Second coordinated element must match the tense and form.

Concept/ApproachMaintain parallelism in coordinated predicates: past simple + past simple. Also keep the natural collocation "appreciated the method adopted (by him)".

Option analysisA. "appreciate … being adopted" → wrong tense and awkward passive progressive.B. "appreciated the method adopted" → correct tense and idiom. ✔C. "appreciate the method of adoption" → incorrect structure and tense.D. Redundant/incorrect phrasing.E. No correction → original mixes "admired" with "appreciating" (nonparallel).

Corrected sentence"He admired the speed with which he completed the work and appreciated the method adopted by him."

Final Answerappreciated the method adopted