A company's quarterly sales data is represented on a line graph. From Q1 to Q2, sales increased steadily. From Q2 to Q3, sales increased at a faster rate. From Q3 to Q4, sales decreased, but the rate of decrease was slower than the rate of increase from Q2 to Q3. Which quarter had the highest sales volume?

The correct answer to the question "A company's quarterly sales data is represented on a line graph. From Q1 to Q2, sales increased steadily. From Q2 to Q3, sales increased at a faster rate. From Q3 to Q4, sales decreased, but the rate of decrease was slower than the rate of increase from Q2 to Q3. Which quarter had the highest sales volume?" is Option C: Q3.

The other options — A) Q1, B) Q2, D) Q4 — are incorrect for this GMAT Exam Prep question. As explained above: Sales increased from Q1 to Q2, then increased *faster* from Q2 to Q3, reaching their peak in Q3. Although sales decreased from Q3 to Q4, the maximum point was achieved in Q3 before the decline began.