what proportion of elected officials in the united states represents single member districts? A all officials at the federal level: none at state and local levels B across local, state, and federal levels C All officals at each level of government D None

B across local, state, and federal levels

Explanation:

A single-member district (single-member constituency) is an electoral district that sends one officeholder to a body. In America, state legislatures and the united state congress are both elected from single-member districts.

In the United States, single member district has been used to elect across all levels i.e. local, state and federal because it makes sure that communities which are small in size and population are represented in legislative assemblies.

b) trade is easy because of the direct line between their major ports. bilateral trade reached 89,6 thousand million.

explanation:

may i ask what challenges?