Answer:
i think C
Explanation: thats what i choose on my middle school test and got it right
Um B? not really sure only one would say is B doesn't sound like it would because of organization
1 million is 1 x 10^6
1 billion is 1 x 10^9
1 trillion is 1 x 10^12
So 12 trillion miles is 12 x 10^12 which converts to 1.2 x 10^1 x 10^12 = 1.2 x 10^13
Need questions so we can answer it
