Answer: A)Big Data influences what we know and do
Explanation:
Big data is a large and complex collection of data which is assessed and analyzed to extract the human behavior and activities-related trend. Stored data is usually diverse and voluminous that describer issue and pattern.This works in the form of software to determines and impacts the behavior .
Other options are incorrect because demographics and exchange feature does not influence the behavioral pattern and interaction of human in case like extracting information regarding flu situation,fever etc to impact the trend and what humans should do about it..Thus, the correct option is option(A).