The Most Basic Way to Establish Cause and Effect Is

question 111

Multiple Choice

The most basic way to establish cause and effect is with a(n) :

• A) two-group research design.
• B) correlation.
• C) interview.
• D) observational study.

---

Definitions:

ABO Blood Groups

The ABO blood group system is one of the most important blood-type systems in human blood transfusion, comprising four main blood groups: A, B, AB, and O.

Passive Immunity

Immunity acquired by the transfer of antibodies or activated T-cells from another individual, providing temporary protection against disease.

Active Immunity

Immunity that results from the production of antibodies by the immune system in response to the presence of an antigen.

Babies

Young human offspring, particularly from birth until they can walk.