Architecture Puzzler #375

If you are building an igloo, which of the following statements are true?

A. Cut blocks of similar size and miter the ends to form the curve.
B. The igloo is constructed of concentric rings of stacked ice blocks with each ring (or "course") completely level.
C. After being set in the wall, each block's top surface should be shaved to slope down towards the center of the floor.
D. Cut the entry access after the whole structure is completed.
E. Provide a fist size hole at the top for ventilation.

The Trenton Bath House by Louis Kahn, the Kresge Auditorium by Eero Saarinen, and the Bavinger House by Bruce Goff were constructed in what year? Clue: They were constructed five years after the Farnsworth House by Ludwig Mies van der Rohe and ten years before the Danziger Studio by Frank Gehry.