The damage due to swelling soils results in losses of ____ in the ...

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The damage due to swelling soils results in losses of ____ in the United States.
   a. tens of millions of dollars, primarily through associated maintenance of cars and trucks,
   b. tens of millions of dollars, primarily through damage to residences and businesses,
   c. tens of millions of dollars, primarily in disruption of truck and train transport,
   d. billions of dollars, primarily through damage to highways and streets,
   e. billions of dollars, primarily through damage to residential homes,

Question 2

Swelling soils are typically due to ____.
   a. kaolinite clay expelling, water which increases the volume of sand layers
   b. heat, which increases the volume of water bound in clay layers
   c. freezing water, which expands, increasing the volume of clay layers
   d. smectite clay increasing in volume as it absorbs water
   e. landslides removing pressure from clay layers, allowing them to increase in volume

[zhanghao]

Answer to Question 1

ANSWER: d

Answer to Question 2

ANSWER: d

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TYSM

[xiazhe]

Gracias!