Select the correct statement$(s)$ regarding bulk flow.
$I-$ In tall plants,water,minerals,and food are moved by a bulk flow system.
$II-$ This type of movement is achieved through a pressure difference between two points.
$III-$ In bulk flow,substances,whether in solution or suspension,move at the same pace as in a flowing river.
$IV-$ This process is similar to diffusion.

• A
  $I, II, III, IV$
• B
  $I, II, III$
• C
  $II, III, IV$
• D
  $II, III$