Grease the wheels means make a process easier or faster. This answer is correct because the expression has a fixed figurative meaning in English. In an SSC idiom question, students should match the whole phrase with its accepted meaning rather than translate each word separately.

• Classroom example: Grease the wheels can refer to a situation involving make a process easier or faster.
• Story example: A writer may use Grease the wheels when describing a situation involving make a process easier or faster.
• Exam example: When a sentence contains Grease the wheels, choose the meaning “make a process easier or faster.”