Final answer:
The statement that the Conciliatory Proposition met most of the American colonists' demands is false. Great Britain's proposal in 1775 did not address key issues such as taxation without representation, hence it was rejected by the colonists.
Step-by-step explanation:
The statement suggests that in the Conciliatory Proposition, the mother country, which refers to Great Britain, conceded to most of the demands made by the American colonists. However, this is false. The Conciliatory Proposition was an offer made by Britain in 1775, in which they proposed that colonies would tax themselves at Parliament's demand. This proposition did not meet most of the demands of the American colonists, as it failed to address their principal grievances, particularly the issue of taxation without representation and legislative independence. Thus, while Britain did attempt to quell the rising tensions with the proposition, it was not sufficient and ultimately was rejected by the colonists leading to the further escalation of the conflict that became the American Revolutionary War.