I am thinking in terms of B is that since the birds prefer the black worm and it has still been able to increase in numbers this means it has found some help externally which is in the form of the blackening of leaves because had it not been the blackening of the leaves it would have not been able t...

Level >700 Comparison SC Question

In contrast to the declarations made at previous UN climate change conferences, the third Conference of the Parties' Kyoto Protocol created legally binding obligations as a result of intensive negotiations among both developed and developing nations. A. In contrast to the declarations made at previ...

Tricky Min/Max Problem

In a deck of 52 cards, each card is one of 4 different colors and there are 13 cards of each color. If cards are to be selected at random from the deck, what is the least number of cards that must be selected to ensure that these are at least 3 cards of each color among selected? 42 Please Explain t...

The Copper Butterfly, an unsigned classical painting, was carbon dated to ascertain its age, previously estimated at 520 years. Manuscripts from that time reveal that one of two possible artists must be responsible for the painting's creation. One of the artists died one week after the painting had...

When a city experiences a sharp decline in population, the city's tax revenues, which pay for such city services as police protection and maintenance of water lines, also decrease. The area to be policed and the number and length of the water lines to be maintained, however, do not increase. Attemp...

Can someone explain each and every option? Especially the difference between B and C!

IMO B?

The Ergonomic Society conducted a study that indicated that many people develop severe back problems during adulthood, and that virtually all such people who received chiropractic treatment showed great improvement. Therefore, in order to minimize the proportion of the population that suffers from ...