Answer:
Step-by-step explanation:
It's really none of the choices. It appeals to Britain's determination to withstand whatever is thrown at her by a so far successful enemy. It appeals to the feeling Britain has about never giving up in the face of adversity.
The parallel construction is certainly very emotional. You have to pick pathos, but there is more happening. It is a quite determined effort.
Pick Pathos, but it is certainly incomplete.