Hi, if it's possible to answer this now, Thank you so much. If you don't know the answer, that's ok :D

Answer:
It is B
Step-by-step explanation:
Since its 12 trillion miles we know that the power of 10 has to be 12. We also know to move decimals forward we need a positive power. Therefore the answer is B) [tex]1.2 * 10^{12}[/tex]
Hope it helps!!!