Based on the premise "By marrying his daughters to sons of the reigning emperor and then engineering timely abdications, a Fujiwara contrived always to be father-in-law, uncle, or grandfather behind the throne.", can we conclude the hypothesis "The Fujiwaras always stayed in power because they carefully constructed familial marriages and arrangements as to forever have male family at the throne." is true (see options)?

Choices: * yes. * it is not possible to tell. * no.
yes