Problem: During the experiment Jennifer poured the liquid into the container while Amy directed the experiment because

My choice: Jennifer was an assistant.

Problem: Elena was the kind of person that acted like a corporate executive unlike Megan, so

My choice: Megan hated being the boss.

Problem: Diamonds are Adam's specialty, whereas Kyle has no experience with them because

My choice: Adam is a jeweler.

Problem: Emily thought the teen girl was very cute but Natalie did not.

My choice:
Emily asked the teen girl out.