A high school administrator is giving a civics quiz to all the juniors in her school to prepare them for an upcoming election. There are 420 juniors in the school, and she gives them the quiz over two days. On the first day, she gives the quiz to 210 juniors, and 160 of them answer the first question correctly. On the second day, she gives the quiz to the remainder of the students, and j answer the first question correctly. If more than 80% of all the juniors answered the first question correctly, which of the following inequalities best describes the possible values of j?
A) j>0.8(420-160) , where j≤ 210
B) j>0.8(420+160) , where j≤ 210
C) j-160>0.8(420) , where j≤ 210
D) j+160>0.8(420) , where j≤ 210