contestada

Read the two sentences:
Courtney passed her math exam.
Courtney did not stay out late last night.
---Which of the following correctly combines the sentences using a coordinate conjunction?
A)Because she did not stay out late last night, Courtney passed her math exam.
B)Courtney passed her math exam she did not stay out late last night.
C)When she did not stay out late last night Courtney passed her math exam.
D)Because, she did not stay out late last night Courtney passed her math exam.