A member of House of Representatives has introduced a bill to protect undocumented immigrants who were brought to the United States with their parents, but it has been killed in the House Rules Committee. Which is the best course of action to get the bill a vote on the floor of the House?

By forwarding a writ of discharge petition.

Explanation:

Discharge petition is a process of getting a bill out of the House Rules Committee and bringing it back to the floor. In a discharge petition, the committee that rejected the bill is discharged from making any considerations to the bill.Discharge petitions are usually  forwarded when certain bills get refused to be introduced in the U.S House of Representatives by the chair of the House Rules Committee.Therefore, the best course of action that the member of the House of Representatives can do when a bill gets killed in the House Rules Committee is to forward a writ of discharge petition.