Sentence 1: Stephanie was very worried about her upcoming Physics exam. 
 Sentence 3: When the other students left to attend a party, Stephanie stayed 
 Sentence 4:  Finally Stephanie took the exam 
 Sentence 5:  She was glad she had studied so hard for her exam 
 Option 1: She and other students met at the library to study. 
 Option 2: She went to study by herself.