Superconductors are resistance free materials that enable (allow) <u>electricity conduction (i.e. electron transportation between atoms)</u>.
As the superconductor temperature is gradually lowered, eventually a Critical Temperature is reached, where the <u>superconductor electrical resistivity</u> suddenly drops to zero. Such drop is so fast, that can be described as a complete matter-phase transition. This is in contrast with typical conductors,<em> where with gradually decreasing temperature there is also a gradually decreasing resistivity (which is also true at temperatures of near absolute zero). </em>
Thus the correct answer is the Second Option: it suddenly drops to zero