which statement best explains the city planning of harappa?
a. harappa was built using a grid system to organize the streets.
b. harappa was built using materials to prevent damage from dry winds.
c. harappa was built in the himalayan mountains for trading convenience.
d. harappa was built along the indus river to encourage travel by water.

Select the five weaknesses of the articles of confederation. congress could not declare war or establish an army. congress could not levy taxes. congress could not control trade. not all the states were represented in congress. no national court system. no executive to enforce the laws. congress could not negotiate with foreign governments. the national government could not borrow money. nine of the states had to agree to pass a law.