Fre describes whether basis for the testimony is adequate.

the answer is: 702

FRE 702 required that all witnesses that presented to jury during trial who are not directly involved in the crime scene must at least had some sort of credentials/expertise on the field that relevant to the case. (such as IT experts for cybercrime, psychology professors for murder cases, etc)

Explanation:

answer; the president uses mass media to gain support for policies;

answer; a team- maintenance role;