Collecting a large pool of behavioral observations requires handling vast datasets, which is the domain of Big Data. Big Data technologies enable the storage, processing, and analysis of large-scale data (e.g., user behavior logs) to inform decisions, a key capability in security analytics.
Option A: Linear regression is a statistical method for modeling relationships, not collecting data.
Option B: Distributed consensus relates to agreement in distributed systems (e.g., blockchain), not data collection.
Option C: Big Data directly supports collecting and analyzing large datasets for insights, fitting the question perfectly.
Option D: Machine learning uses data to train models but relies on data being collected first, often via Big Data.