The question is asking us: "When making informed decisions about health
products or procedures, it's important to consider... We definitely have
to consider the risks, if the risks are too high, we might want to
decide against a procedure. Another thing we might want to consider is
the cost: can we afford the procedure? We should also think: is the
source credible? Is the doctor experienced, for example? So the best
answer is:
If groundwater dissolves the limestone and other minerals in the ground, the surface on top may eventually fall into it, causing a sinkhole.<em> (B)</em>
