The "a" europe's second longest river forms a border between romania and "b" before it drains into the "c" sea.

"a" options
rhine, vardar, elba, danube

"b" options
slovenia, croatia, albania, serbia

"c" options
black, ionian, baltic, adriatic.

What can happen to solar radiation when it enters earth’s atmosphere? check all that apply. it is absorbed by earth. it is reflected by clouds. it is reflected by glacial ice. it is condensed into visible light. it is amplified by water molecules.