The equation `(x+3-4(x-1)^(1//2))^(1//2)+(x+8-6(x-1)^(1//2))^(1//2)=1` has
(A) no solution
(B) only `1` solution
(C) only `2` solutions
(D) more than `2` solutions
A. no solution
B. only `1` solution
C. only `2` solutions
D. more than `2` solutions