The correct options are
A <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->
Official records
C <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->
Paintings and drawings
D <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->
Photographs
Primary sources, like official records of the event etc., give us first hand account of a historical event