What did mary and william have to do to ascend the throne?

drive out mary’s father, james ii
agree to capitulate at parliament’s whim
create and maintain a standing army out of royal coffers
agree to and sign the english bill of rights

The answer is:

agree to and sign the English Bill of Rights

After the english civil war, Mary and William had to sign and agree to the English Bill of Rights in order to ascend the throne, with this the finance and army would be administrated by the parliment and granted civil and political rights to all english citizens.

the use of email to replace slower surface mail.

honestly you should get that checked out because it really isn't normal