The underlined word "competitive" in the second paragraph means ______.

A．People could spend their nights anywhere whether it was their home or not.
B．People only served their friends to spend their nights at home.
C．People had to return to their home whether they were far away or not.
D．Strange people had to spend their nights in the field when it got dark.

A．all the people were kind and equal in different activities
B．all the people quarreled with each other in every fight
C．people often took part in different fights
D．every child tried to climb to the top of ail the activities