When is a direct democracy most effective? A. when the wants of representatives are met.
B. when it is used with smaller populations.
C. when an entire nation uses it consistently.
D. when it serves the purpose of politicians. ​

B. When it is used with smaller populations.

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.