Which of the Following Is an Important Principle of Inquiry

Which of the following is an important principle of inquiry and debate in science?

A) Scientists can never establish absolute proof about anything,but rather,a high degree of certainty.
B) Scientists use backroom deals and often-changing unwritten rules to exert influence.
C) Scientists find it essential to base their arguments on facts as well as intuition and preference.
D) Scientists often test rival theories by planting disinformation as a strategic approach.
E) Scientists pick and choose facts to support their own claims with little fear of repercussion.