Which of the Following Are $x$ -Intercepts of the Function $f(x)=-\sin \left(\frac{x}{2}\right)-4$

Short Answer

Which of the following are $x$ -intercepts of the function $f(x)=-\sin \left(\frac{x}{2}\right)-4$ ?
A) 0
B) $\pi$
C) $2 \pi$
D) $3 \pi$
E) $4 \pi$
F) $6 \pi$
G) None of the above