Why were things so bad in the Middle Ages?

Illnesses like tuberculosis, sweating sickness, smallpox, dysentery, typhoid, influenza, mumps and gastrointestinal infections could and did kill. The Great Famine of the early 14th century was particularly bad: climate change led to much colder than average temperatures in Europe from c1300 – the 'Little Ice Age

Bis your correct answer

The answer is d.  the north had organized schools, whereas the south had few organized schools.