Choose the sentence that is punctuated correctly. I'm worried Sandra that your book is lost.
I'm worried, Sandra, that your book is lost.
I'm worried, Sandra that your book is lost.

C.) I'm worried, Sandra that your book is lost.

Explanation:

In the first option, there is no comma beside "Worried". There should be one there, which means that can't be correct.

Then the second one has 2 commas. There shouldn't be one beside "Sandra". Therefore that option isn't correct.

That leaves the third one. There's a comma beside "Worried". This is the correct option.

Hope this helps!

b is the answer.   i sat on the lumpy sofa, totally exhausted, with a bad taste in my mouth, wondering what i should do next.  

may i see the historical information and the excerpt?