Soap reduced the surface tension of water because only 10 drops of water and soap mixture were added to the penny before the liquid spilled over, compared to 50 drops of water without soap. Sources of error include variations in the volume added with each drop, the time between drops, and the surface of the penny being cleaned as the water/soap mixture is added in each trial. The experiment could be improved by observing other indications of surface tension, including measuring the contact angle.]

it would be rhyolitic hope this

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.