Answer:
Public Provident Fund (PPF)
Since PPF has a long tenure of 15 years, the impact of compounding of tax-free interest is huge, especially in the later years. Further, since the interest earned and the principal invested is backed by sovereign guarantee, it makes it a safe investment.
Explanation:
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Over time, Kai-May and Ray's satisfaction will decline more than Veena and Jerry's will as Veena and Jerry’s interjection of humor into their discussions most likely makes them a lot happier than Kai-May and Ray since Kai-May and Ray are seriously focused on the problems themselves which leads to a boring discourse. They also forget to take a break during their discussions by having light-hearted talks in between, which diffuses a lot tension.
The correct answer is C. Japan's attack on Pearl Harbor.
Because of the attack on Pearl Harbor, we declared war against Japan, and since Japan had an alliance with Germany, they declared war on us.
And that is how we got involved in WW2 and became a superpower.