What gender role does okeke expect his daughter-in-law to fulfill?
the role of a modern nigerian woman who is well educated and strong
the role of a partner and companion who is consulted in all decisions
the role of a woman who has had a "proper christian upbringing"
the role of an independent woman and mother who is still secondary to the man

The answer is the third one

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

hope this .. .