Answers are as follow:
Part A
What argument does Kennedy make in his “Ich bin ein Berliner” speech?
ANS: Democracy is morally superior to communism.
Part B
Which answer choice presents the most logical reasoning in support of the argument identified in Part A?
ANS: "... we have never had to put a wall up to keep our people in."
Answer:
Interest meant to "Bring profit the lender".
Explanation:
The interest is a particular percentage of the amount that initially borrowed amount. simply it can be said as the "costs to borrow money". The amount that the lender gives or the borrower gets is called as the Principal amount. Interest is calculated based on the principle amount and this interest amount differs from place to place.
Interest is calculated as

Where
p is the principal
r is the rate of interest
t is the time
This interest amount is the profit for the lender.