What type of numbering system is binary?
OA base 2 with only 0s and 1s
OB. base 3 with only 0s, 5s, and 10s
OC. base 10 with 10 single-digit numbers 0 through 9
O D. base 16 with 10 single-digit numbers 0 through 9 and the first 6 alphabet letters A through F