The answer is "D"
The ice age lasted for a long... Long time.
I believe it’s stereotypes response.
Given that a directional hypothesis is a prediction made by a researcher regarding a positive or negative change, relationship, or difference between two variables of a population, a two-tailed test is the perfect tool to validate it because a two-tailed test is designed to examine both sides of a specified data range.
So the final answer to this question is:
True.
Busy highway thats why they build sound barriers when a residetial area is directly next to a highway