The best way to ward of ailments later in life is to exercise at least 30 min per day

The statement above is TRUE.
Researchers has reported that age related illness can be drastically reduced or even eliminated by exercising everyday for at least thirty minutes. Regular exercise reduce the risk of developing many diseases. The types of physical exercise that one can participate in include: brisk walking, dancing, cycling, etc.

Your answer is c. explanation: plasma  is the fourth state of matter, derived from the gaseous state of matter.  plasma  can contain free  electrons  and/or  ions. while  plasma is never neutral, it can either be positively or negatively charged.  gases, however, are electrically neutral.