Who are the only people who may introduce a bill in the house of representatives? employees of federal agencies lobbyists for special interest groups committee staff and aides members of the house of representatives

Only representatives can introduce bills in the House of Representatives. Ideas can come from representatives or citizens. Once the bill is "introduced" then a clerk (bill clerk) will give it a number and then another clerk (reading clerk) will read the bill(s) to the representatives. Then the bill goes to a standing committee ( a committee in the House or Senate that will consider bills in a certain subject area). 

Hopefully this helps. I just learned about this process in political science class.

letter d is correct.