Which of following inferences is best supported by the excerpt below?

Which of following inferences is best supported by the excerpt below?

I was stunned. A call-up: everyone knows what that means. Visions of concentration camps and lonely cells raced through my head. How could we let Father go to such a fate? "Of course he's not going." declared Margot as we waited for Mother in the living room. "Mother's gone to Mr. van Daan to ask whether we can move to our hiding place tomorrow. The van Daans are going with us. There will be seven of us altogether." Silence. We couldn't speak. The thought of Father off visiting someone in the Jewish Hospital and completely unaware of what was happening, the long wait for Mother, the heat, the suspense - all this reduced us to silence.

A The SS is on their way to arrest the Franks.
B. A call-up from the SS is not the worst thing that could happen.
C. If Anne's father returns in time they will be safe.
D. They are horrified that Father is out, not knowing the SS has called for him.