C-12-Q027mediumsingle_mcqIf u⃗=AB⃗\vec{u}=\vec{AB}u=AB and v⃗=AC⃗\vec{v}=\vec{AC}v=AC, then u⃗−v⃗=\vec{u}-\vec{v}=u−v=aBC⃗\vec{BC}BCbCB⃗\vec{CB}