Explanation:

- The sentence suggests that the scheme's failure was inevitable from the beginning.

- Destined: This means something is meant to happen. The scheme was "destined" to fail implies it was bound to fail from the start. This word fits well with the context suggesting inevitability.

- Uncertain: This indicates doubt or lack of surety. It does not fit as it suggests ambiguity rather than a certain outcome.

- Decided: This implies a choice or resolution. It doesn't imply an inescapable conclusion.

- Remote: This means distant or unlikely. While it can refer to chances, it doesn’t fit the context of certainty.

- Erroneous: This means incorrect. It doesn’t fit as it refers to error, not inevitability.