The personification "she is a fen of stagnant waters" in lines 2–3 suggests that England is in a state of stagnation and struggle, implying that the nation is facing many problems that hinder its progress. The phrase likens England to a fen—a low-lying wetland that is often flooded and stagnant—indicating a lack of vitality and movement.
Thus, the best answer is:
- England's many problems prevent it from progressing as a nation.