In the context of data manipulation, what does the error message "multiple columns cannot be converted to a scalar value" indicate?
A) An attempt to perform an operation that requires a single value on a dataset with multiple columns.
B) A successful conversion of a multi-column dataset into a single numeric value.
C) A syntax error in a code block due to missing column headers.
D) An issue with importing a dataset where columns are incorrectly formatted as scalars.