A footer appears at the top of each printed page. _________________________

If you are using a bar chart to compare the price of different brands of regular gasoline, the brands would be placed ________

A) in the chart title B) on the horizontal X axis C) on the vertical Y axis D) on a trend line

All the nodes in a binary tree are ______.

a) single nodes b) 1-nodes c) 2-nodes d) double nodes