Final answer:
Angela displayed the trait of being manipulative by asking both her parents separately about going to a party and using their contrary answers to her advantage to attend the event.
Step-by-step explanation:
When Angela asked her mother if she could go to the party and was told no, but then asked her father who said yes, Angela demonstrated a character trait of being manipulative. This is shown by her actions of playing her parents off one another to get her way, as described by, "Angela enjoyed herself at the party." By using her parents' differing responses to her advantage, Angela exhibits the ability to influence situations to her favor, possibly at the expense of honesty and straightforwardness.