As a Scientist, What Are the Most Realistic Dangers of Trying

Multiple Choice

As a scientist, what are the most realistic dangers of trying to prove a theory a "right"?

A) You are no longer open to other possibilities.
B) You might convince others to see things only "your" way.
C) You might subconsciously use only the data that fits your model.
D) There is no danger, you are right when you are right.