What is the most likely cause of this problem?

Your company is loading comma-separated values (CSV) files into Google BigQuery. The data is fully imported successfully; however, the imported data is not matching byte-to-byte to the source file.

What is the most likely cause of this problem?
A . The CSV data loaded in BigQuery is not flagged as CSV.
B . The CSV data has invalid rows that were skipped on import.
C . The CSV data loaded in BigQuery is not using BigQuery’s default encoding.
D . The CSV data has not gone through an ETL phase before loading into BigQuery.

Answer: B