Which of the following statements is true? The Challenger Deep was explored by Picard and Walsh. Data from Jason-1 will help scientists study deep sea life. Salinity refers to the amount of salt (NaCl

Which of the following statements is true? The Challenger Deep was explored by Picard and Walsh. Data from Jason-1 will help scientists study deep sea life. Salinity refers to the amount of salt (NaCl) in the ocean. All of the above. None of the above.