A．Those who don’’t emphasize bookish excellence in their pursuit of happiness.
B．Those who are aware of difficulties in life but know how to avoid unhappiness.
C．Those who measure happiness by an absence of problems but seldom suffer from N. B. D. ’’s.
D．Those who are able to secure happiness though having to struggle against trying circumstances.

A．Because it was more nutritious than other type of bread.
B．Because it did not require yeast.
C．Because it stayed fresh for a long time.
D．Because it took less time to brake.