Your technical team has just identified a process that requires some corrective action. Corrective action is closest to:

What are the defects?

What are the corrective actions?

How do the corrective actions effect on the production?

Do they have side effects?

Do other constraints occur after the corrective actions?

How can the new constraints can be eliminated?

If I'm not forced to choose only one option, I will choose all of them. If so, I will choose option (d), due to the fact that all other options are related to that.

Corrective action is closest to Rework

Thanks for invitation....I endorse answers given by colleagues &Experts

If it is Project Work - Answer will be REWORK

If it is business operations (BAU - Business As Usual) than it will be close to Continuous Process Improvement.

C – Corrective action is closest to rework by definition. PMBOK® Guide, 5th edition, p. 559: “Action taken to bring a defective or nonconforming component into compliance…”

RCA  ( Root Cause analysis) is a structured facilitated team process to identify root causes of an event that resulted in an undesired outcome and develop corrective actions. The RCA process provides you with a way to identify breakdowns in processes and systems that contributed to the event and how to prevent future events. The purpose of an RCA is to find out what happened, why it happened, and determine what changes need to be made. It can be an early step in a PIP, helping to identify what needs to be changed to improve performance. Once you have identified what changes need to be made, the steps you will follow are those you would use in any type of PIP ( Performance Improvement Project) 

Option B defect analysis, because corrective measures are usually identified in control quality process..

a. Continuous process improvement

thanks for invition ,,,,,,,,,, my choice is option C

C is the best option.

Thanks...............