of imports of articles or services like or directly competitive with articles which are produced or services which are supplied by such firm contributed to such total or partial separation, or threat thereof, or to such decline or failure to increase in sales or production, or (ii) decreases in exports of articles produced or services supplied by such firm, or imports of articles or services necessary for the production of articles or services supplied by such firm, contributed to such total or partial separation, or threat thereof, or to such decline in sales or production. (2) For purposes of paragraph (1)(B): (A) Any firm which engages in exploration or drilling for oil or natural gas shall be considered to be a firm producing oil or natural gas. (B) Any firm that engages in exploration or drilling for oil or natural gas, or otherwise produces oil or natural gas, shall be considered to be producing articles directly competitive with imports of oil and with imports of natural gas.