Final answer:
Without a specific time frame, it is difficult to provide a precise policy that Highland Scots opposed. They might have opposed high British taxes on salt or policies showing favoritism toward Catholics, correlating with their historic Protestant identity and opposition to Catholic favoritism in Britain.
Step-by-step explanation:
The Highland Scots historically opposed a variety of policies, but without a specific time frame, it is difficult to give a precise answer. However, in the context of the information provided, Highland Scots might have opposed policies such as the high British taxes assessed on salt, or repressive laws directed at certain demographics within the population, similar to the repressive laws regarding women mentioned in choice c. The reference to favoritism towards Catholics suggests that Highland Scots, who were primarily Protestant, may also have resisted policies that appeared to favor Catholics over Protestants, which aligns with historic tensions in the British Isles, especially during periods such as the Jacobite risings in the 18th century.