What process replaced the practice of joint referral, which had allowed bills to be referred for consideration to two House committees simultaneously, after it was abolished in 1995 by the 104th Congress?

The referral to the lead committee.        

Explanation:

In the 104th Congress in 1995, the joint committee referral was abolished.  Now, the matters that were discussed by that committee, such as bills, are treated in a primary committee, which is called the lead committee.  This committee also shares power with other committees that are related to the matter.          

the answer would be c. sediment buildup on continental slope

                                                                                -hope this -