What is the main reason Britain's claim to all lands between Newfoundland and Florida failed?

A. Britain had too few settlements to enforce that claim.

B. Britain's settlements did not include military personnel.

C. British settlers were anxious to have neighbors of any nationality.

D. British forces were too busy defending against Native American attacks.

Answer (A) " Britain had too few settlements to enforce that claim."

A. Britain had too few settlements to enforce that claim.

Explanation:

It was the fact that they didn't have enough settlements to enforce the claim that the claim between newfoundland and Florida failed, the enforcement needed more settlements and settlers to defende the region and claim the land as theirs, as they lacked the strength and forces to keep them the claim failed.