By the end of next month, the engineering team ______ on this prototype for nearly two full years.
Which choice completes the text so that it conforms to the conventions of Standard English?
- A
has worked
- B
had worked
- C
will work
- Dcheck_circle
will have worked
Explanation
Future perfect "will have worked" expresses an action that will be completed before a specific future point ("end of next month").