Which sentence correctly uses punctuation with a subordinating conjunction?

Question

*
0/1
She studied hard; and she passed the test.
She needed to study: because she passed the test.
Because she studied.
Because of her studying, she was able to pass the test.

Answer 1

Because she studied.

Answer 2

wrongggggggggggggggg

Answer 3

Apologies for the mistake. The correct sentence that uses punctuation with a subordinating conjunction is:

She needed to study because she passed the test.