单项选择题

Questions 1 to 5 are based on a conversation. At the end of the conversation you will be given 10 seconds to answer each of the following five questions. Now listen to the conversation. What is the cause of recurring dreams

A.The individual has an unresolved problem in his waking life.
B.The individual is suffering from low level toothache.
C.The individual has a significant period in his baby life.
D.The individual wish to escape from something.