What is a possible reason the coefficient for variable B was negative and not positive?

Variable D is not significantly impacting the dependent variable.

After seeing your findings, the majority of your team agreed that variable B should be positively impacting the dependent variable.

What is a possible reason the coefficient for variable B was negative and not positive?
A . Variable B is interacting with another variable due to correlated inputs
B . Variable B needs a quadratic transformation due to its relationship to the dependent variable
C . The information gain from variable B is already provided by another variable
D . Variable B needs a logarithmic transformation due to its relationship to the dependent variable

Answer: A