Suppose there are 10 million part-time workers and 90 million full-time workers in an economy. Five million of the part-time workers switch to full-time work. As a result

a. the official unemployment rate will fall
b. the official unemployment rate will rise
c. the official unemployment rate will remain unchanged
d. the size of the labor force will increase

D. The size of the labour force will increase.

Explanation:

Switching over from part time to full time simply means either they are done with what makes them walk part time,or the work is demanding and the government decided to make them full time staffs,due to the availability of resources to cater for them.

More new part time individuals will be employed to take their place thereby creating jobs and falling the official unemployment rate.

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