1 Which statement best captures the central idea of this article?
O A. Cell phone users are demanding more efficient batteries.
eavy-duty
h batteries
m of
attery's
O B. Although sulfur is a common element, it is very difficult to
use.
O C. New research in developing sulfur-based batteries has
promising results.
explode.
O D. The search for better batteries involves making them
smaller, safer, and longer- ting
ay
neray in a