If 4th term in the expansion of (2 + 3/8x)¹⁰ is numerically greatest term. Then the range of x is:

A) [-64/21, -2] ∪ [2, 64/21]
B) [-53/21, -2] ∪ [2, 53/21]
C) [-64/21, -1] ∪ [1, 64/21]
D) [-53/21, -1] ∪ [1, 53/21]