Ryan was really looking forward to lunch because his mother had prepared a tuna salad sandwich.
Unfortunately, the mayonnaise she used had been left out too long and was spoiled. Not long after
eating the sandwich, Ryan felt sick and had to rush to the bathroom. Thereafter, the mere mention
of a tuna sandwich would make Ryan nauseous.
1. What is the unconditioned stimulus?

4. what were some of the losses suffered by germany as a result of the treat of versailles?

How long was the government shutdown?

Regarding interpersonal attraction, which of the following statements is false? most people find it easier to initiate an interaction with another person rather than reciprocate to someone else’s overtures. proximity promotes attraction by increasing the frequency of contact between people. reciprocity may be the most important factor influencing the development of friendships. in choosing a mate we tend to marry someone who is like us in almost every way, a pattern called homogamy.