Which best describes the outcome of the siege of Petersburg?

Because Union troops were greatly outnumbered by Confederate troops, it took months for the North to achieve victory.

Although Union troops greatly outnumbered Confederate troops, it took months for the North to achieve victory.

Because Confederate troops were greatly outnumbered by Union troops, it took months for the South to achieve victory.

Although Confederate troops greatly outnumbered Union troops, it took months for the South to achieve victory.