During the summer growing season, phosphate is at a high level. It has a vital role in the breakdown of the sugars manufactured by chlorophyll. But in the fall, phosphate, along with the other chemicals and nutrients, moves out of the leaf into the stem of the plant. When this happens, the sugar-breakdown process changes, leading to the production of anthocyanin pigments. The brighter the light during this period, the greater the production of anthocyanins and the more brilliant the resulting color display. When the days of autumn are bright and cool, and the nights are chilly but not freezing, the brightest colorations usually develop.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What occurs in bright light to leaves during fall?
Ah, so.. greater the production of anthocyanins

This changed with the recent sovereign-debt crisis. The ECB always could, and through the late summer of 2011 did, purchase bonds issued by the weaker states even though it assumes, in doing so, the risk of a deteriorating balance sheet. ECB buying focused primarily on Spanish and Italian debt. Certain techniques can minimise the impact. Purchases of Italian bonds by the central bank, for example, were intended to dampen international speculation and strengthen portfolios in the private sector and also the central bank.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What risk is assumed when the ECB purchases bonds from weaker states?
Ah, so.. a deteriorating balance sheet

In several nations, rulers welcomed leaders of the Enlightenment at court and asked them to help design laws and programs to reform the system, typically to build stronger national states. These rulers are called "enlightened despots" by historians. They included Frederick the Great of Prussia, Catherine the Great of Russia, Leopold II of Tuscany, and Joseph II of Austria. Joseph was over-enthusiastic, announcing so many reforms that had so little support that revolts broke out and his regime became a comedy of errors and nearly all his programs were reversed. Senior ministers Pombal in Portugal and Struensee in Denmark also governed according to Enlightenment ideals. In Poland, the model constitution of 1791 expressed Enlightenment ideals, but was in effect for only one year as the nation was partitioned among its neighbors. More enduring were the cultural achievements, which created a nationalist spirit in Poland.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): In what country was the model constitution of 1791 in effect for only one year?
Ah, so..
Poland