Describe the elements of the set $A^{**}$ for $A=\{10\}.$

A$.\{(01{)}^n|n=0,1,2,$dots$\}$

B$.\{1^m{0}^n|m,n=0,1,2,$dots$\}$

C$.\{(10{)}^n|n=0,1,2,$dots$\}$

D$.\{0^m{1}^n|m,n=0,1,2,$dots$\}$

E$.\{(10{)}^n,(01{)}^m|m,n=0,1,2,$dots$\}$