The scholar-official class (scholar gentry) of the song dynasty achieved their status by
a)gaining favor with the emperor.
b)owning large and important businesses.
c)proving themselves in battle against the mongols.
d)passing examinations based on neo-confucian teachings.

john f. kennedy purpose was to make his argument a strong appeal to emotion in order to make an impact and connection to american citizens. he want to achieve peace by telling the citizens they shouldn't be afraid of other nations.

explanation:

ww1 weapons: tank. tanks were used for the first time in the first world war at the battle of the somme. they were developed to cope with the conditions on the western front. the first tank was called 'little willie' and needed a crew of 3.