$A$ - In bryophytes,the gametophyte is dominant and haploid.
$B$ - In pteridophytes,the gametophyte is multicellular,short-lived,and haploid.

• A
  Both are incorrect.
• B
  $A$-correct,$B$-wrong.
• C
  $A$-wrong,$B$-correct.
• D
  Both are correct.