Questions 4 to 7 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions. Now, listen to the conversation.

The man has to call his foreman about

A．they lost a little ability to reason over the years.
B．there is no decline in knowledge or reasoning ability.
C．their memory was not as good as it had once been.
D．their minds became a bit more active as they grew older.

A．Children playing with fire.
B．Fireworks set off in a house with explosives.
C．Sparks from a fireworks display falling on the warehouse.
D．The firing of a gun.