Dennis won a bunch of prizes for Ian at the carnival, so 
OPTIONS:
- Dennis was nice.
- Ian was nice.
Dennis was nice.

Betty projects much more happiness than Amy, 
OPTIONS:
- Betty because/although she smiles a lot more often.
- Amy because/although she smiles a lot more often.
Betty because/although she smiles a lot more often.

The teenager took some medicine to help with her period but the 
OPTIONS:
- period was too strong.
- medicine was too strong.
period was too strong.