If $u(v(x))=\frac{4}{1+\sqrt{x}}$ , Which of the Following Could Be True? Mark All

Multiple Choice

If $u(v(x) ) =\frac{4}{1+\sqrt{x}}$ , which of the following could be true? Mark all that apply.

A) $u(x) =1+\sqrt{x}, v(x) =\frac{4}{x}$
B) $u(x) =\frac{4}{x}, v(x) =1+\sqrt{x}$
C) $u(x) =\frac{4}{1+x}, v(x) =\sqrt{x}$
D) $u(x) =\sqrt{x}, v(x) =\frac{4}{1+x}$