Answers B and C are quite vague without context.
answer D isn't important since everyone was broke and unemployed so this affected little to no people
during this time period the great depression (reason why answer D is wrong) has affected everyone so unemployment was a huge issue so it has to be answer A
The correct answer is B. It is the only one that should be written with periods - a.m., meaning - ante meridiem, or 'before noon'. The other examples are written without a period.
D. The author is using understatements. This is a common technique when talking about something fairly serious or upsetting, as it creates a shocking response.
The second theme is that the author want his readers to know that there is more to life then we can see, or that a building/ strengthening a friendship is worth more than any treasure