Correct Answer:
D. ability
Knack means a special skill or ability.
- Correct answer - ability: it has the same meaning as Knack.
- rogue: a dishonest person - wrong, it does not mean the same as Knack.
- imperfection: a fault or flaw - wrong, it does not mean the same as Knack.
- manipulate: to handle or control skilfully, often unfairly - wrong, it does not mean the same as Knack.