Can someone help with periods and commas?

Select the correctly punctuated sentence.
A) If you have any further comments or questions, please do not hesitate to contact me.
B) If you have any further comments or questions please do not hesitate to contact me.
C) If you have any further comments, or questions, please do not hesitate to contact me.

My answer A

Select the correctly punctuated sentence.
A) Having been up late last night, I may not make our lunch date.
B) Having been up late last night I may not make our lunch date.
C) Having been up, late last night, I may not make our lunch date.

My answer B

Select the correctly punctuated sentence.
A) If you need help with your postoperative care be sure to let us know.
B) If you need help, with your postoperative care, be sure to let us know.
C) If you need help with your postoperative care, be sure to let us know.

My answer is C

Thanks!

2 answers

#1 and #3 are correct. #2 is incorrect.

You can review comma uses here:
http://grammar.ccc.commnet.edu/grammar/commas.htm
Select the correctly punctuated sentence.
1. Thank you for asking me to meet with your patient, Wonder Woman, who came to the appointment accompanied by her husband.
2.Thank you for asking me to meet with your patient Wonder Woman who came to the appointment accompanied by her husband.
3.Thank you for asking me to meet with your patient, Wonder Woman who came to the appointment accompanied by her husband.

my answer was 1. but said i was wrong! so was unsure
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