Describe the techniques used to make mud bricks.

Adobe bricks (mud bricks) are made of earth with a fairly high clay content and straw. If produced manually the earth mix is cast in open moulds onto the ground and then left to dry out. Adobe bricks are only sun-dried, not kiln-fired. When used for construction they are laid up into a wall using an earth mortar.

Explanation:

i also think it is c

the answer would more than likely a.)falling crop prices  

hope the answer is right and ,either way have a nice day.