Movement into and out of cells — practice question

Which statement is correct for a phloem sieve tube element that is unloading to a sink?

• Awater potential of the phloem sieve tube element becomes less negative than sink; lignification of the cell wall: absent
• Bwater potential of the phloem sieve tube element becomes less negative than sink; lignification of the cell wall: present
• Cwater potential of the phloem sieve tube element becomes more negative than sink; lignification of the cell wall: absent
• Dwater potential of the phloem sieve tube element becomes more negative than sink; lignification of the cell wall: present