While conducting his thesis,Lucas made sure that all his research methods were empirical in nature.This means that the conclusions he reached were based on _____________.

A) reasoning
B) traditional beliefs
C) speculation
D) observation

Empirical Nature

Characterized by reliance on observation or experience rather than theory or pure logic.

Research Methods

Various strategies, techniques, and tools employed in scientific inquiry to gather, analyze, and interpret data.

Observation

The act of carefully watching and analyzing phenomena or behaviors in order to gather information, often used in research and scientific studies.