Suppose a new technology allows mining companies to substitute mechanical robots for human miners. As a result, we would expect the demand curve for human miners to

a.be unaffected.

b.become less elastic.

c.become more elastic.

d.shift to the right.

The demand for cellphones increases. As a result,

a.the wage rate increases in the industry and the quantity demanded of workers falls

b.the quantity demanded of workers increases, the wage rate rises, and the supply of labour increases.

c.the wage rate increases in the industry and the quantity supplied of workers increases.

d.the demand for workers increases, hiring increases, but wages stay the same

An increase in the productivity of labour with college, trades and university qualifications, ceteris paribus, induces

a.an increase in the cost of labour.

b.firms to offer a higher wage for workers since the workers are now more productive.

c.firms to hire fewer workers since fewer workers are needed with the increase in productivity.

d.an increase in the demand for labour