Read the following text and answer the questions below:

Anna Wagner Keichline (Pennsylvania 1889 - 1943) was an American architect and inventor, known for being the first registered female architect in Pennsylvania and for inventing the K-brick in 1927. It was, like most bricks, made out of clay, but it was cheaper, lighter, and had better thermal, acoustic and fire-resistant properties. It could also be filled with insulating materials.

1. Considering the characteristics of this brick, in which of the following could be used as a building material?
   a) The floor of a home.
   b) The wall of a home.
   c) An oven.
   d) A rehearsal room for a band.
2. Specify why you consider the K-brick to be appropriate for the uses above.