A$.$ It costs less than other machines.

B$.$ It never rusts out.

C$.$ It replaces humans altogether.

D$.$ It is faster than a human.

$2.$ Services make up what percent of the U$.$S$.$ economy?

A$.40\%$

B$.64\%$

C$.90\%$

D$.4\%$

$3.$ The robot can

A$.$ produce twice as many sushi rolls as a human worker.

B$.$ produce four times as many sushi rolls as a human worker.

C$.$ make the sushi chef obsolete.

D$.$ produce three times as many sushi rolls as a human worker.

$4.$ Service sector investment in software and R&D

A$.$ has now surpassed $4\%$ of GDP$.$

B$.$ is shrinking.

C$.$ exceeds investment in factories.

D$.$ is not important in most firms.