The group young italy formed because italians were unhappy about
unrest and rebellions.
the spread of nationalism.
the new king of sardinia.
rule by foreign nations.

the correct answer is: "the new king of sardinia".

the youth group young italy was founded by giuseppe mazzini in 1831. before that, he had sent a letter to the new king of sardinia, king charles albert, demanding him to unite and lead italy as a whole.

his petitions were ignored and in this moment he decided to found young italy, as a movement that would pursue the creation of a united republic of italy (hence aiming to derrocate king charles as the ruler of italy too), by promoting general insurrection and direct action on reluctant italian reactionary states or italian states that were ocuppied at the moment by the astro-hungarian empire.

the foundation of greek city-states: following the fall of the mycenaean civilization in the 10th century bc, the area surrounding the empire went through its own mini dark ages. answer and explanation

a. poison gas was sprayed over battlefields by airplanes to weaken enemy positions before major attacks.