The Table Below Shows the Sales for a Plastics Manufacturer

Multiple Choice

The table below shows the sales for a plastics manufacturer recorded over the past year. The seasonal indexes for each quarter are also provided. To track the trend for these four quarters, use the indexes to deseasonalize the sales data. Overall, based on these four quarters, sales:

A) are definitely increasing.
B) are definitely decreasing.
C) are constant.
D) are exponentially decreasing.
E) cannot be determined.