Answer: Secondary historical sources.
Explanation:
Two types of sources, primary and secondary, have generally been represented in history. The primary sources are artefacts, documents, records, and other raw, source material, and they serve primarily as a source of information for the historian.
Secondary sources include quotes, comments and the like. For many historians, secondary sources create problems, they may be useful, but they need to be correctly interpreted. Because of their form, they are subject to change (because the quotation can be distorted over time and get another meaning), so they should be carefully handled. Therefore, they are distrustful of context and unreliable for proof.
The two word term would be Power vacuum.
Explanation:
A power vacuum is what happens when there is sudden loss of authority in the governance and there is no potent replacement of it in sight.
This is usually what happens after the death of a long reigning dictator or a strong leader who had held the country so that there was no other alternative ready.
So the stability of their governance leads no potent alternative and makes a power vacuum in the nation.
The power vacuum will be the void of no strong leadership here.
I believe that the correct answer should be B), because he worsened the relations with the Soviet Union, relations that were much better during the time of previous president, Richard Nixon. It wasn't that much about the Afghan people, since he thought that i posed a""a grave threat to the free movement of Middle East oil". Also, he lost his 1980 election to Ronald Reagan, who promised-and delivered-an even more vigorous anticommunist foreign policy, which is why I strongly believe that the correct answer is B).
Prime minister would be your correct answer for this intial question.