[单选题]
98.21: The diagram to the right depicts iron filings sosb 3j.ek*hr 7p ,1arfprinkled au tofe +/5gi xmm-r)c/round three permanent me5 ug)tmf/+o x mir-c/agnets. Pole R is the same as poles
A. poles T and Y
B. poles T and Z
C. poles X and Y
D. poles X and Z
E. poles S, T, and Z
