The correct option is "Volunteering is a good way to make friends, help the community, and feel good."
Parallelism is achieved when the same grammar pattern is used when listing ideas. In this example, the parallel structures are "make friends, help the community and feel good" since they all use the same grammar structure: verb+object.
In the rest of the options, there is a break in the pattern so no parallelism is achived.
Assuming you meant:
The taxi firm charges £3.00 standing charge, plus 50p per mile. How much will it cost Jenny to travel 8 miles?
Then the answer would be,
50p (per mile) x 8 (miles) = £4.00.
£4.00 + £3.00 (S.O) = £7.00.
Therefore, the whole journey will cost Jenny £7.00.
-Hope this is what you were looking for, if not sorry.
Personally I would put down C. It seems like it would allow the audience to pay more attention, maybe then instead of them being in disgust they could all have a laugh.
B is the correct answer........................................