讨论一下prep 1-24

24.   (29155-!-item-!-188;#058&003857)

Tiger beetles are such fast runners that they can
capture virtually any nonflying insect. 
However, when running toward an insect, the beetles intermittently stop,
and then, a moment later, resume their attack. 
Perhaps they cannot maintain their pace and must pause for a moment's
rest; but an alternative hypothesis is that while running tiger beetles are
unable to process the resulting rapidly changing visual information, and so
quickly go blind and stop.

Which of the following, if discovered in
experiments using artificially moved prey insects, would support one of the two
hypotheses and undermine the other?

(A) When a prey insect is moved directly toward a
beetle that has been chasing it, the beetle immediately turns and runs away
without its usual intermittent stopping.

(B) In pursuing a moving insect, the beetles
usually respond immediately to changes in the insect's direction, and pause
equally frequently whether the chase is up or down an incline.

(C) The beetles maintain a fixed time interval
between pauses, although when an insect that had been stationary begins to
flee, the beetle increases its speed after its next pause.

(D) If, when a beetle pauses, it has not gained on
the insect it is pursuing, the beetle generally ends its pursuit.

(E) When an obstacle is suddenly introduced just
in front of running beetles, the beetles sometimes stop immediately, but they
never respond by running around the barrier.

搜了一下，以前没有人讨论过

正确答案是C

我的想法是这样的：

A选项降低了visual的可能性，但是没有更多的支持rest

B选项同时降低了visual和rest的可能性

C选项支持了visual，但是似乎不够undermine "rest"啊？