To find out how much paper remained on the roll after Taylor made her sign, you need to subtract the amount of paper she used from the total amount on the roll.
Total paper = 123 yards
Paper used for the sign = 56 yards
Remaining paper = Total paper - Paper used
Remaining paper = 123 yards - 56 yards = 67 yards
Since none of the options provided in the question (A, B, C, D) include 67 yards, this may be an error in the question or the options given. However, the correct amount remaining after using 56 yards of the 123 yards is 67 yards.