Answer :
In English, the possessive form is used to show ownership or a close relationship. When dealing with multiple owners of something, the way we form the possessive can change depending on whether they own the item together or individually.
John and Susie's: This form (option a) is used when John and Susie own the yacht together, indicating joint ownership. This is because the possessive 's is only added to the second name, showing that the first and second name hold possession together.
John's and Susie's: This form (option c) would be used if John and Susie own separate, individual yachts. In this case, each name would have their own possessive form, suggesting they each own something separately.
Given the information that John and Susie own the yacht together, the correct form is: John and Susie's. Thus, the answer is a. John and Susie's as this indicates that the yacht is co-owned by both John and Susie.
