To answer this question, you need to understand the characteristics of the CURR data type in a dictionary.
Option A) The field must be linked to another field of type CUKY - This option is correct. In SAP, the CURR data type represents a currency field. It is a numeric field that is linked to another field of type CUKY, which represents the currency code.
Option B) Decimals must be defined in the domain - This option is incorrect. While decimals can be defined in the domain, it is not a specific requirement for a field of type CURR.
Option C) The field must be numeric - This option is incorrect. While a field of type CURR is numeric, it is not the only requirement for this data type.
Option D) No other requirement exists - This option is incorrect. There is a specific requirement for a field of type CURR, which is to be linked to another field of type CUKY.
The correct answer is Option A. This option is correct because a field defined in the dictionary of type CURR must be linked to another field of type CUKY, which represents the currency code.