The author communicates in the given phrase that the American colonies were making slow but steady progress toward conflict with the British. Option B is the correct answer. The word "inching" suggests that the colonies were moving slowly towards the revolution, indicating a gradual but consistent development of tension and conflict with the British. It implies that the colonists were not making sudden or impulsive moves, but rather were carefully and deliberately preparing themselves for a possible uprising against the British.
~~~Harsha~~~