💡 Detailed Explanation
The phrase '一筋縄ではいかない (ikkisujinawa dewa ikanai)' is an idiom meaning 'not easy to deal with' or 'tricky.' The speaker is expressing that the project is complex. The correct response, 'ええ、どこから手をつけていいものか (Yeah, I don't even know where to start),' shows agreement and understanding of the difficulty. The other options are incorrect: one misunderstands '縄 (nawa)' literally as 'rope,' and the other ('it'll be over soon') contradicts the nuance that the task is difficult and will likely take time.