Option(C) is correct
The problem with the original sentence is the list: we need to have an ‘and’ at the right point. We can have a list such as ‘a, b, and c’ when we intend the items to have equal weight.
Or we can have a list such as ‘a and b, as well as c’ if the first two items are to be taken together.
But we cannot have a list like this: a, b, as well as c. Nor can we have ‘a and b and c’. Using this information we can eliminate A, B and D.
Of the remaining choices, C is best as E is awkward and brings in an unnecessary ‘its’.