7.R2 How much do you know about the Caspian Sea? Take the quiz 16 Listen, read, and check your answers.1How many countries border the Caspian Sea?A threeB fourCfive2 How deep is the southern end of the Caspian Sea?A about 5 mB over 1, 000 m C over 3, 000 m3 The Caspian Sea is like a lake because itA has salty water. B is extremely big.C doesn't connect to an ocean4 What produces caviar?A the sturgeon B the Caspian seal C the Caspian turtle​