1. An unbalanced tree is one a. in which most of the keys have values greater than the average. b. whose behavior is unpredictable. c. in which the root or some other node has many more left children...

1.
An unbalanced tree is one

a.
in which most of the keys have values greater than the average.

b.
whose behavior is unpredictable.

c.
in which the root or some other node has many more left children than

right children, or vice versa.

d.
that is shaped like an umbrella.