下图为某日甲、乙、丙、丁四地太阳位于正北或正南方时太阳高度示意图。读图,甲、乙、丙、丁四地中( )
A:甲在北极点上
B:乙在北极圈上
C:丙在北回归线上
D:丁在南温带
—Do you often exercise to keep strong?
—Yes, I do.