Answer:This threat to internal validity is called TESTING.
Explanation:
Testing refers a instant when a test is repeated with measures remaining constant as they were in the first test.
If participants are given the same test multiple times it is very likely that they may perform better only because they have mastered the test procedure and can now know how to respond better.
This will affect internal validity of the test because the result are no longer the real presentation of the outcome of the test.
Internal validity refers to how trustworthy an outcome is when looking at the cause and effect.
1: The Zimmerman Telegram, in which Germany offered Mexico "substantial aid" in regaining Mexican territory lost to USA in the Mexican-American War (1846-48) if they joined the war on Germany's side and attacked USA.
<span>2: Unrestricted submarine warfare by the Germans.This was sinking neutral US ships and killing US merchant seamen.Further, it was preventing legitimate imports and exports to and from the USA, thus harming the economy.</span>
Muslims believe that Islam<span> completes the</span>revelation<span> of God's final message to man through the Prophet Muhammad Praise Be Unto Him (PBUH) and the </span>Holy Qur'an<span>. </span>
