Question

You are tasked with analyzing sales data from multiple sources for a quarterly report. The raw data contains missing values and duplicate records. What should your first step in the analysis process be?

A Build a predictive model to estimate missing values.
B Perform exploratory data analysis to identify trends
C Remove all duplicate records and fill missing values with averages
D Clean the dataset by handling missing values and duplicates appropriately
E Generate visualizations to highlight quarterly performance metrics
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