The strongest evidence for causality comes from which of the following research methods?

The strongest evidence for causality comes from the experimental method.

Causal-comparative research examines pre-existing groups and cannot control the supposed cause.

Correlational research shows how variables move together but never proves that one causes the other.

The none choice is wrong because experiments give the firmest basis for causal inference.

An experiment combines manipulation, control, and random assignment of participants.

These three features let it rule out most rival explanations for an observed effect.