A Child Is Trying to Stack Two Uniform Wooden Blocks

Multiple Choice

A child is trying to stack two uniform wooden blocks, 12 cm in length, so they will protrude as much as possible over the edge of a table, without tipping over, as shown in the figure. What is the maximum possible overhang distance d?

A) 5 cm
B) 6 cm
C) 7 cm
D) 8 cm
E) 9 cm