Answer choice (A): This is not supported by the stimulus. Not only do we not know that driver education is the only way to reduce traffic accidents, we don't know if it has that effect at all! The stimulus never said that Jablonski's plan would actually help, but only that she wanted to help and felt that this was one way to do so. We cannot prove that driver education helps at all, and we definitely cannot prove that nothing else would help.
Answer choice (B): This is the correct answer choice. This answer matches the above prephrase nicely. We know that altruistic actions, like Jablonski's, sometimes have positive consequences for the person who did them, because "sometimes" means "at least once", and at least this one time that happened. Jablonski acted altruistically (for the benefit of another rather than for oneself) and she ended up benefiting (she sold some cars).
Answer choice (C): This is unsupported by the stimulus. We have no information about who tends to benefit from driver education, or if anyone in fact does benefit. This brings in new information and must be rejected.
Answer choice {D): We have no information in the stimulus about what "usually" happens. It happened one time, and that's all we know about. We don't even know if this worked out to Jablonski's overall best interests - maybe she donated 10 cars and sold just 2, taking a loss to the tune of 8 cars?
Answer choice (E): We don't know if Jablonski's action was successful, we don't know how broad the support was for it, and we don't know about any similar actions, just this one. Maybe some actions are successful with narrow support, or even none?
credit: forum.powerscore