The question is intended as a self-test for readers. Answers may be found in Appendix C.
To “trickle up” a node in a descending heap means
a. to repeatedly exchange it with its parent until it’s larger than its parent.
b. to repeatedly exchange it with its child until it’s larger than its child.
c. to repeatedly exchange it with its child until it’s smaller than its child.
d. to repeatedly exchange it with its parent until it’s smaller than its parent.
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