GMAT Critical Reasoning (CR) | A United States manufacturer of farm equipment reported a

Based on description, we know that Net Income (sales - expenses) increased, although sales decreased. The best explanation would describe a decrease in expense or perhaps an increase from some other source of sales.

A - Adding a new line of product doesn't necessarily mean more sales.
B - No wages mean less expenses, however sales were not impacted during the strike because stocks on hand were 'adequate' for customers
C - Out of scope. Sales by other foreign co.'s have nothing to do with this
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