What was accomplished at the constitutional convention in 1787?
a. the u. s. constitution was writtenb. the articles of confederation were amendedc. the u. s. constitution was amendedd. the articles of confederation were written

a.the u.s. constitution was written

Explanation:

During the Constitutional Convention of 1787, several delegates assembled to discuss and revise the existing government, which was, by that time the Articles of Confederation. After some discussion, they recognized the need for a whole new document, u.s. constitution. This constitution separated the powers of the government, and create a two-house Congress: the Senate and the House of Representatives.

supplies had to travel a long distance across water on ships that were often attacked, so they did not reach europe

a.

congress passed laws allowing for free passage between states.