Old patient come need complete denture, after examination the dentist told him, lateral forces will be good but vertical forces will break the seal

Female first time need denture you do examination  to soft and fault, you said to pt. the denture will resist lateral movement but vertical movement cause loading (removing)  of denture what is type of vault:

OR

Old patient come need complete denture, after examination the dentist told him, lateral forces will be good but vertical forces will break the seal:

a. U shaped palate

b. V shaped palate***

C. flat

D. paralyzed