Which sentence includes a singular possessive noun?

Snowboarding is a family affair in Hannah Teter's family, which includes her siblings and parents.
Snowboarding is a family affair in Hannah Teters' family, which includes her siblings and parents.
Snowboarding is a family affair in Hannah Teters family, which includes her sibling's and parent's.
Snowboarding is a family affair in Hannah Teters family, which includes her siblings' and parents'.

Question

Which sentence includes a singular possessive noun?

Snowboarding is a family affair in Hannah Teter's family, which includes her siblings and parents.
Snowboarding is a family affair in Hannah Teters' family, which includes her siblings and parents.
Snowboarding is a family affair in Hannah Teters family, which includes her sibling's and parent's.
Snowboarding is a family affair in Hannah Teters family, which includes her siblings' and parents'.

Ultrilliam · Answer

Moved to English

Vocaloid · Answer

super old question, but since siblings and parents are plural siblings' and parents' do not count as singular possessive nouns but Hannah Teter's does because Hannah Teter is a singular noun