Since absolute value is the distance from that number to 0, taking the absolute value of a negative number would be essentially making it positive. Putting a negative in front of the absolute value would make the number negative, however. A. 5, 0, 3, -4: sort of in order from greatest to least, but not really what we're looking for. B. -7, -3, 0, 4: this one's in ascending order, so I believe this is the correct option. C. -6, 3, 1, 4: not really in any particular order whatsoever. D. 12, -5, 2, 8: not in any order either.
Since we are given that it is an even number, we know there is only 3 options (2, 4, 6). Since only one of them is an even number, we know that we need the fraction 1/3 or 33.3% for a probability.
An exponential has the base at the bottom, or the lower portion. Think of "basement" to help remember this. The exponent is the number up top, so 12 is the exponent.