Lack of Vitamin A will lead to （）．

A．我们要坚决改善社会治安，治理脏乱环境，创建更多的文明城镇。
B．我们如不搞改革、不坚持开放政策，我们的战略目标就不可能实现。这 是一个我们必须通过的关。
C．我们要形成我市独特的经济开发 格局：旅游搭台，经贸唱戏。
D．我们要鼓励社会力量办学，以调动各办面的办学积极性。

A．Because difierent schools set up difrerent physical education programs．
B．Because the physical activity of children will influence their health in adulthood．
C．Because nowadays children spend too much time on their studies．
D．Because only four percent of elementary schools provided daily physical education．