A company conducted a survey to study customer preferences regarding several attributes of its service offering, including Speed and Capacity. The margin of error for the difference of the two ratings was $6\mathrm{.}0\%.$ Which of the following results indicates a true difference?

A Speed $=32\%,$ Capacity $=30\%.$

B Speed $=38\%,$ Capacity $=34\%.$

C Speed $=31\%,$ Capacity $=31\%.$

D Speed $=30\%,$ Capacity $=20\%.$