<span>Western people
believed that the president should be a natural born citizen of their country and
must have a residency for at least 10 years. A president should have a highest
educational background because he read many legislative data that needs better
comprehension and knowledge is essential in terms of decision-making. Another
qualification of president that western people believe is having an excellent leadership where people under
him would follow his command. Lastly, he should be a public servant; he must
serve for the betterment of his country.</span>
I am pretty sure it is A or C.
Explanation:
20 men can do 1 W in 36 days
=> 20 men can do 1/36 W in 1 day
=> 10 men can do 1/72 W in 1 day.
30 girls can do 1W in 36 days
=> 30 girls can do 1/36 W in 1 day
=> 12 girls can do 1/90 W in 1 day.
Together 10 men and 12 girls can do 1/72 + 1/90 W in 1 day
= 9/360 = 1/40 W in 1 day.
Therefore they need 40 days to do the piece of work.