Which Is Most Correct? on Closing, the Purchaser's Solicitor Completes

Which is most correct? On closing, the purchaser's solicitor completes

A) a sub-search and executions search, while the vendor's solicitor delivers compliance certificates and cash.
B) a sub-search and executions search, while the vendor's solicitor delivers a deed and keys.
C) a sub-search, while the vendor's solicitor delivers a deed and keys.
D) a sub-search, while the vendor's solicitor delivers a deed, keys, and compliance certificates.