2. Given $f(x)=a \sin x+b \sqrt[3]{x}+4(a, b$ are real numbers $)$ and $f\left(\lg \log _{3} 10\right)=5$, then the value of $f(\lg \lg 3)$ is
(A) -5
(B) -3
(C) 3
(D) takes different values depending on the values of $a, b$