In the context of NumPy operations in Python, what does the error message "ufunc 'isnan' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule 'safe'" typically indicate?
A) The data type of the input array is incompatible with the 'isnan' function, which expects numerical data types.
B) The 'isnan' function has encountered a syntax error in the code.
C) The input array contains too many dimensions for the 'isnan' function to process.
D) The 'isnan' function is deprecated and no longer supported in the current version of NumPy.