Topological order using bfs

Question

The following question was found in Sedgewick and Wayne book about algorithms in java:

4.2.19 Topological sort and BFS. Explain why the followin

Answer 1

Counter-example:

A -> B
A -> C
B -> C

BFS starting at A could find the nodes in order A-B-C or A-C-B, but only one of those is a topological sort.