President Andrew Jackson<span> was 61 years and 11 months </span>old<span> at his inauguration on March 4, 1829</span>
No idea what primary research so i'm going to assume you mean primary source in which case it depends on the type of evidence, like if it's a personal account then that's a primary source but if it's someone telling of someone else's story it's not.
B and D are the correct answers. The Agricultural Revolution in ancient civilisations began in Levant (modern-day West Bank), between 10,200 and 8,800 BC. Mesopotamia was not the origin of the revolution, although it was the site of early developments in the Neolithic Revolution around 10,000 BC.
people killed the italian leader and that caused a lot of friction between uk and germany
Explanation:
States today is this idea of church and state