Which statement is correct about phloem sieve tube elements?
- ACompanion cells provide structural support to the phloem sieve tube elements.
- BLignified walls of phloem sieve tube elements prevent transport of mineral salts by mass flow.
- CPhloem sieve tube elements become narrower as movement of sucrose occurs.
- DPlasmodesmata allow movement of water and solutes across cell walls of phloem sieve tube elements.