Which of these events might lead to the modification of a scientific idea?


a:A scientist uses a computer to teach a scientific concept to students.

b:Two scientists doing the same experiment in different parts of the world under the same conditions get the same results.

c:One scientist finds evidence that she feels doesn’t fit a theory. Other scientists agree that her results are valid.

d:A scientist performs an experiment and finds out that one of the chemicals used in the experiment was contaminated.