Members of the House of Representatives must be a U s. otizen for how many years? A 10
B
7
12
20

seven years

Explanation:

The Constitution requires that Members of the House be at least 25 years old, have been a U.S. citizen for at least seven years, and live in the state they represent (though not necessarily the same district).

answer; i believe its called ; checks   and balances;

a factory opens that mass-produces light bulbs.

explanation:

not sure if that's an answer to your questions but this is an example! : )