[Q]: How does the sentence end?

Angela stared bewildered as Katrina explained you could use vitamin C to lighten hair dye because 

[A]: Katrina was knowledgeable.


[Q]: How does the sentence end?

Matthew knew how to cure a bleeding nose but Lawrence did not because 

[A]: Lawrence had a limited  knowledge of first aid.


[Q]: How does the sentence end?

Jennifer would outgrow Sarah in a matter of a few months even though 

[A]:
Jennifer was younger.