One classic study found that people were especially likely to salivate a lot when tasting lemon juice.

introverted

Explanation:

Introversion and extraversion are two terms that describe a central dimension in some human personality theories. These were popularized by Carl Jung, but are now used in casual speech as well. People who are extroverted tend to be outgoing, talkative and energetic. On the other hand, introversion is characterized by a reserved and solitary behaviour. As these are two ends of the same spectrum, a rise in one quality is correlated with a decline in the other one.

d - failures.

the only attempted british colony in north america before 1600 was roanoke, virginia, which was a total failure. england claimed several areas, including newfoundland, but made no sustainable attempts to colonize them before 1600.

answer; one person; monarch;