B. Pioneering research on radioactivity. She discovered Polonium and Radium, and won the 1903 Nobel Prize.
Explanation:
Blitzkrieg was too effective for its own good. The huge advancements it made on the USSR meant that it became more difficult to fight them as they needed supplies which were hard to get as they were deep into Russia territory.
Hydrogen, Lithium, Sodium, Potassium, Rubidium, Caesium, Francium
He completed a masterpiece that was approved to a guild for evaluation
Answes: The first was Christianity and the Catholic Church (as well as the official language of the Church, Latin). The second was feudalism. The expansion of Catholic Christianity and the feudal system had a profound impact on western Europe in the medieval era.
Explanation:
