Here are the answers that best meet conventional English standards for each underlined section:
Question 1:
Best option:
Friendliness, although sometimes overlooked within a workplace, is important
(This option maintains proper comma placement for clarity and is grammatically correct.)
Question 2:
Best option:
workplace, whether it be to a boss or a coworker, a friendly attitude
(This option correctly uses a comma before "whether" and maintains the flow of the sentence without introducing a fragment.)
Question 3:
Best option:
Small things, such as a smile, can go a long way
(This option correctly uses commas to separate the phrase "such as a smile" from the main clause.)
So the answers are:
- Friendliness, although sometimes overlooked within a workplace, is important
- workplace, whether it be to a boss or a coworker, a friendly attitude
- Small things, such as a smile, can go a long way