Which sentence correctly uses punctuation with a subordinating conjunction?

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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.

3 answers

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

She needed to study because she passed the test.