Which of the following is free from grammatical error?
Show answer & explanation
Correct answer: D
Explanation
Option A is incorrect because "senior" should be followed by "to" instead of "than" (e.g., "She is senior to me by two years.").
Option B is incorrect because "prevented" should be followed by "from going" instead of "to go out" (e.g., "He was prevented from going out by the guard.").
Option C is incorrect because "look forward to" is a phrasal verb that should be followed by a gerund (verb+ing) instead of an infinitive (e.g., "I look forward to meeting you soon.").
Option D is correct. When "as well as" connects two subjects, the verb agrees with the first subject, which is "The manager" (singular), so "was" is the correct verb form.