The body has a number of systems that protect against infection. Which of the following correctly orders four of these systems from most to least foundational?
Choose 1

A. B cell, lymphatic tissue, lymph node, lymphatic system

B. B cell, lymphatic tissue, lymphatic system, lymph node

C. lymphatic tissue, B cell, lymph node, lymphatic system

Pretty sure it’s A

Explanation:

the answer is "a.) well–developed vascular system."

explanation:

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.