[求助][讨论]对一道题的错误选项谈谈我的看法，请高人给看看

Drakedragon

In order to withstand tidal currents, juvenile horseshoe crabs frequently burrow in the sand.  Such burrowing discourages barnacles from clinging to their shells.  When fully grown, however, the crabs can readily withstand tidal currents without burrowing, and thus they acquire substantial populations of barnacles.  Surprisingly, in areas where tidal currents are very weak, juvenile horseshoe crabs are found not to have significant barnacle populations, even though they seldom burrow.

Which of the following, if true, most helps to explain the surprising finding?

A Tidal currents do not themselves dislodge barnacles from the shells of horseshoe crabs.
B Barnacles most readily attach themselves to horseshoe crabs in areas where tidal currents are weakest.
C The strength of the tidal currents in a given location varies widely over the course of a day.
D A very large barnacle population can significantly decrease the ability of a horseshoe crab to find food.
E Until they are fully grown, horseshoe crabs shed their shells and grow new ones several times a year.
   Answer: E

这道题选E，我也觉得E是很好的选项，但是我一直对B有困惑，就是B说在current最弱的地方ba才能附在shell上，做他因解释，为什么B不行，老帖子说B解释不了suprisingly finding，这又是为什么呢，请指教