The Lower Solar Angles Characteristic of High Latitude Locations Leads

The lower solar angles characteristic of high latitude locations leads to lower levels of insolation because:

A) the solar radiation has further to travel and so looses its strength
B) the solar radiation is spread over a larger unit area
C) the solar radiation is spread over a smaller unit area
D) the solar radiation must travel through more volume of atmosphere and so more radiation is reflected back to space
E) the high latitude regions receive solar radiation from the cooler part of the Sun