Which among the following is not true for making a causal inference from a quasiexperimental design? a.            Cause and effect must be related. b.            Cause must precede the effect....

Which among the following is not true for making a causal inference from a quasiexperimental design?

a.            Cause and effect must be related.

b.            Cause must precede the effect.

c.             There should be no influence of an extraneous variable.

d.            The participants are randomly assigned to groups.