The answer is D. the availability of complementary goods
The natural increase (or decrease) of a population………
Scalloped patterns of responding are typically associated with Fixed interval schedules. This is further explained below.
<h3>What are
Fixed interval schedules?</h3>
Generally, Fixed-interval schedules are ones in which the first answer will not be rewarded until a certain length of time has passed from the beginning of the schedule.
In conclusion, Responses that follow a scalloped pattern are often connected with programs that use fixed intervals.
Read more about Fixed interval schedules
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Because Cuba is rather close to US and thousands of kilometers away from Spain.
hope this helps you.
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What time period are we talking about here?
