I believe the answer is option a
Answer: In the mid 1800s, there was a lot of slavery in southern United States. Many Black people from United States escaped their masters and headed to Canada. They settled all over the country because they wanted to escape slavery. Moving to Canada was possible because of the Underground Railroad. European immigrants were the best settlers for the challenging Prairies, because of their familiarity with agriculture, rural lifestyles, and harsh climates. Economic and social situations in Europe were increasingly challenging in the mid to late 1800s.
he first-past-the-post, winner-takes-all system, which is used for every election in the USA - federal, state and local - makes life difficult for third parties.
243 I believe hope this helped
<span>A negative reinforcer is a stimulus
that is removed and, thus, increases the probability of a response</span>
Reinforcement
aims to increase the response. Negative reinforcement is when a hostile stimulus
is removed in order to ensure that the chances of obtaining a response are high