101.   The root causes of obviousness are obvious.

102.   The root cause is the situation of the Palestinian Arabs.

103.   The root cause of crime, he said, is the poverty of values.

104.   The root causes of the horse shortage are year-round racing and a mass exodus of owners and breeders from racing.

105.   The root cause is the Concorde itself and its vulnerability to such catastrophic disasters.

106.   The root cause of this underperformance is the decline in the value of the Japanese yen against the dollar.

107.   The visual aura is providing neurologists with their first big clues about the root causes of migraines, and possibly all headaches.

108.   The truth is that, because we often are too busy heaping blame on others, we rarely discuss among ourselves the root causes of our own self-destructiveness.

109.   The world must also pay attention to the root causes of insecurity and instability in South Asia.

110.   They are now on the trail of several so-called candidate genes that may run in families and may explain the root cause of flawed serotonin metabolism.