A challenge about women and marriage in Islam

[Dragonetti]

2. The opinion that Aisha was a 9-year-old girl when she got married to Muhammad is not a settled matter. The exact age durng her marriage and the consummation of her marriage with Muhammad is disputed amongst scholars because there are several other hadiths/narrations which suggest that, according to calculations derived from specific dates, she could not have been 9 years old when she got married to Muhammad. Most of them suggest that she was at least 12 at that time.

Actually her age doesn't matter, because Islam doesn't put a restriction on age
If a girl is physically and mentally suitable to be married she can

(same rules applies in California)

Again you do not see many if any nine year old marrying at the age. Parents would not allow their still growing child to marry at that age. Most children at that age do not even understand the entanglements of marriage.