Well, plug in all of the answer choices and divide it by 8 to test it. Any answer choices that don't come out as a decimal will be correct.
61,532,112/8=7,691,514
61,532,182/8=7691522.75
61,532,122/8=7691515.25
61,532,162/8=7691520.25
"1" was the only digit that didn't give us a decimal. All of the other ones cannot evenly be divided by 8, so the only correct answer is: 1