Answer:
B. She and I will see the ballet Swan Lake on Friday night.
Explanation:
"I" is a subject pronoun, and the subject is the person or thing doing the action as in "I went to the store."
"Me" is an object pronoun, and the object is the person or thing the action happens to as in "Alex liked me."
Use you and I when it is the subject of the sentence; use you and me when it is the object of the sentence.
If it is a subject, you should say they and I. If it is an object, you should say them and me.
