the patter of tiny feet

is there the patter of tiny feet in the funkypancake household ? we’re not sure, but it might be a mouse.
so, as an experiment i’ve loaded 5 mouse traps and strategically placed them in the loft.
the two on the left have peanut butter and the two on the right have chocolate as their bates.
the fifth trap is off to the left and has no bate (but is set). This is a control-trap (important for all experiments i think).
which trap (if any) do you think will catch a mouse (which we don’t even know exists) ?
[apologies to any vermin lovers out there]