Suppose That Event $A$ Is the Origin Event in the Home Frame and That

Multiple Choice

Suppose that event $A$ is the origin event in the Home Frame and that event $B$ occurs at $t=1 \mathrm{~ns}$ and $x=10 \mathrm{~ns}$ in that frame. What would be the minimum $x$ -velocity $\beta$ that an Other Frame would have to have relative to the Home Frame if $B$ occurred first in that frame?

A) 10
B) 1
C) 0.60
D) 0.40
E) 0.10
F) B can't occur first.