The correct answer is D. All the above.
The average crushing strength of hand moulded bricks is 6000 t/m2. This means that a hand moulded brick can withstand a force of 6000 tonnes per square metre before it crushes.
The average tensile strength of hand moulded bricks is 200 t/m2. This means that a hand moulded brick can withstand a force of 200 tonnes per square metre before it tears.
The average shearing strength of hand moulded bricks is 600 t/m2. This means that a hand moulded brick can withstand a force of 600 tonnes per square metre before it shears.
These strengths are important because they determine how much weight a hand moulded brick can support. For example, if you are building a wall with hand moulded bricks, you need to make sure that the bricks are strong enough to support the weight of the wall and any other loads that will be placed on it.
The strengths of hand moulded bricks can vary depending on the type of clay used, the way the bricks are made, and the firing process. It is important to check the strength of the bricks you are using before you start building.