City X has a population of 100 million people which includes 18 million population under 15 years-old and 12 million population above 64 years- old. In the population between 15 and 64 years-old, those who did not look for job or currently unavailavle job are 6 millions in total, and 4 millions had already taken a full-time retirees. There are also 20 millions of people who were looking for job in pervious month but failed and totally out of work. For the remaining population,there are 15 millions of part-time workers which spend one hour, two hour and three hour per week evenly, and others are all full-time workers. Calculate the unemployment rate for City X (round up to two deciminals). A. 0.58 B. 0.29 C. 0.50 D. 0.33