Which of the areas designated A, B, and C are smallest repeating units, analogous to two-dimensional unit cells?
A. only A
B. only B
C. only C
D. A, B, or C
Answer:D
Which of the areas designated A, B, and C are smallest repeating units, analogous to two-dimensional unit cells?
A. only A B. only B C. only C D. A, B, or C