Answer: B. He wants you to correct the errors in the current report.
Step-by-step explanation:
Mr Blum's complements is only the on the past results, work done before and not the current analyses. He does not say directly that the current report is full of errors. He knows the current report is complete but not done properly so he makes inquiries of when the reports will be finished. This is a polite way of telling you to correct the errors in the current report. Since you done well in the past reports he compliments you on that to make you motivated, encouraged and not discouraged to make the necessary corrections to the report. By complimenting your results on past analyses, he feels that you will be motivated to correct the errors in the current report.