Your colleague suggests you are 'barking up the wrong tree' when you are trying to convince the boss about a project. What does your colleague mean?

Correct option is C

Option (c) is the correct meaning of the given idiom.
Idiom: “Barking up the wrong tree” means to make a false assumption or take a wrong approach, especially by directing efforts toward the wrong thing. (गलत दिशा में प्रयास करना)
Example: If you think I caused the error, you're barking up the wrong tree.
Other related idioms and their meanings:
· Miss the mark – To fail to achieve the desired result.
· Go off track – To lose the right direction or focus.
· Jump the gun – To act before the correct time.