Daily Insolation Received at the Top of the Atmosphere

Daily insolation received at the top of the atmosphere.The total daily insolation received at the top of the atmosphere is charted in watts per square meter per day for four locations (1 W/m2/day = 2.064 cal/cm2/day) .The vertical dashed lines mark the equinoxes and solstices,two of each during the year.
Which of the following is true relative to insolation at the thermopause relative to latitude?

A) Annually,higher latitudes receive more insolation than lower latitudes.
B) Annually,insolation is evenly distributed with little change by latitude.
C) Annually,lower latitudes receive more insolation than the high latitudes.
D) Insolation can only be measured longitudinally,not latitudinally.
E) Insolation variations is governed by elevation,not latitude.