[单项选择]Women who smoke during pregnancy produce ______.

In ancient Greece athletic festivals were very important and had strong religious association. The Olympian athletic festival held every four years in honour of Zeus, king of the Olympian Gods, eventually lost its local character, became first a national event and then, after the rules against foreign competitors had been abolished, international. No one knows exactly how far back the Olympic Games go, but some official records date from 776 B.C.
The games took place in August on the plain by Mount Olympus. Many thousands of spectators gathered from all parts of Greece, but no married woman was admitted even as a spectator. Slaves, women and dishonoured persons were not allowed to compete. The exact sequence of events is uncertain, but events included boy’s gymnastics, boxing, wrestling, horse racing and field events, though there were fewer sports involved than in the modern Olympic Games.
On the last day of the Games, all the w
A. only male Greek athletes were allowed to participate in the Games
B. all Greeks, irrespective in of sex, religion or social status, were allowed to take part
C. all Greeks, with the exception of women, were allowed to compete in the Games
D. all male Greeks were qualified to compete in the Games