Movement into and out of cells — practice question

Which changes take place as sucrose moves from leaves into phloem sieve tubes for transport to a sink?

• Awater potential in phloem sieve tubes becomes less negative; volume of liquid in phloem sieve tubes decreases
• Bwater potential in phloem sieve tubes becomes less negative; volume of liquid in phloem sieve tubes increases
• Cwater potential in phloem sieve tubes becomes more negative; volume of liquid in phloem sieve tubes decreases
• Dwater potential in phloem sieve tubes becomes more negative; volume of liquid in phloem sieve tubes increases