The first step in designing or redesigning a product is
a.
thinking about ways to solve the problem.
b.
deciding what needs you are trying to meet.
c.
building a prototype.
d.
fully researching the problem.

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.

there are no correct statementd on the list of choices you provided.