A Dark Object Sitting in Sunlight Gets Warm $Q$ Or Energy Transferred by Electromagnetic Radiation

Multiple Choice

A dark object sitting in sunlight gets warm. The sun radiates light because it is very hot, much hotter than the object. So should we categorize the radiation that the object receives from the sun as being heat $Q$ or energy transferred by electromagnetic radiation $\left[E_{\mathrm{ER}}\right]$ ? Be prepared to justify your answer with an argument (multiple reasonable arguments are possible) .

A) Heat $Q$
B) Energy transfer $\left[E_{E R}\right]$
C) It depends on how we define the system boundary.
D) It doesn't matter.