Bias a) the relationship between two variables that can be observed and measured b) measures the opinions and attitudes of individuals in a society c) tendency to select samples that support the research d) data that has already been gathered from a larger population

Bias is influenced facts, experiments, research, etc- due to someone's personal view or opinion on something. Not an actual fact or piece of data. 

I would say "B" is the best answer since it states the opinions and attitudes of individuals in a society. 

Bias is a way scientists can make sure information is not influenced and can check to see if the research/facts are accurate. 

I hope this helps!
~kaikers

Hey there!

Bias measures the opinions and attitudes of individuals in a society, so your answer is going to be: Option B

Hope this helps
Have a great day (:

Your answer will be a.