Select the most appropriate set of options to fill the blanks. The Metal Man stands in a dark, dusty corner of the Tyburn College Museum. The visitor who gives it a closer view (A) at the silent tragedy in the set, determined expression and at the (B) mark upon the chest. It is a six-sided blot, of a deep crimson hue, with strange pink lines (C) from it. Of course it is generally (D) that the Metal Man was once Professor Thomas Kelvin of the Geology Department.