Which sentence correctly uses possessive form?
a. my sister-in-law's are graphic art's business is very successful and allows her to work from home.
b. my sister-in-laws are graphic arts' business is very successful and allows her to work from home.
c. my sister-in-law's are graphic arts business is very successful and allows her to work from home.
d. my sister-in-laws' are graphic arts business is very successful and allows her to work from home.

Questions

1. His sister’s-in-law/sister-in-law’s letter came as a surprise to Chuck.

2. Arizona’s/Arizonas’ climate is dry.

3. She is writing a paper on Byron and Shelley’s/Byron’s and Shelley’s poems.

4. I met a man whose/who’s sister I know.

5. It’s too bad that the dog’s/dogs’ foot got hurt.

6. Smith’s/Smiths’ house is red.

7. Kevin and Mike’s/Kevin’s and Mike’s parents, Arthur and Alice Brooks, are both scientists.

Answers

1. sister-in-law’s

2. Arizona’s

3. Byron’s and Shelley’s

4. whose

5. dog’s

6. Smiths’

7. Kevin and Mike’s

no its not a run on sentence however i think you meant wet suits not sours also a run on sentence would be like surfers surf all winter long in southern california by using wet sours to keep them warm and the live their all year long  

ok if it wasn't the hans one it was probably c or he thought the mountain was collapsing on them.