Explanation:

- In the code language, the letters in the words are rearranged.

- “CAUTIOUS” becomes “CUAITUOS”.

- “C” remains unchanged.

- "A" shifts to become the 3rd letter “U”.

- "U" remains the 2nd letter.

- “T” remains the 4th letter.

- “I” remains unchanged.

- "O" remains the 6th letter.

- "U" remains the 7th letter.

- “S” remains unchanged.

- “DEADLINE” becomes “DAELDNIE”.

- “D” remains unchanged.

- “E” shifts to the 2nd position “A”.

- "A" shifts to the 3rd position “E”.

- “D” remains at the 4th position.

- “L” shifts to 5th position.

- "I" shifts backwards to 8th position.

- "N” remains unchanged.

- “E” remains unchanged.

- For “ECONOMIC,” following the same pattern:

- "E" shifts to the 2nd position “O”.

- "C" remains unchanged.

- "O" shifts to 3rd position "C".

- "N" shifts to 4th position "O".

- "O" shifts to 5th position "N".

- "M" shifts to 6th position "I".

- "I" remains unchanged.

- "C" shifts to 8th position "M".

- Option 4. EOCONIMC is the correct transformation.