Electricity is the manifestation of traveling currents. These currents however are unable to move unless one were to complete a "circuit" (Word you are looking for). If the circuit is not completed electricity doesn't travel.
C. Is the first thing, B. Is second, A. Is third, and D. Is last
The correct answer is B. According to the American Cancer Society, tobacco poses the greatest risk for developing cancers. It was estimated that there is a 22% deaths per year due to cancer caused by tobacco use. During 2004, about 1.6 million deaths were recorded due to cancer.
<span>I imagine the intended correct answer here is B. Chromosomal disease. However, it is worth mentioning that the correct term to use here would be chromosomal disorder. Chromosomal disorders are usually due to either the addition or subtraction of one chromosome.</span>
