You didn't list the options to choose from but I found them elsewhere.
The answer is - couples in happy marriages make external attributions for negative behavior and internal attributions for positive behavior; while couples in unhappy marriages make internal attributions for negative behavior and external for positive. Happy couples blame outside forces for issues whereas unhappy couples blame each other.
It's A 3 the three are Northwest Territories, Nunavut and Yukon
By electing new leaders and adopting a democrating form of life
The answer is Variable
Explanation: A variable is a quantity or a number that can vary or take on different values.
The variable is normally represented as a letter, in this case this number is represented as a "A".
The result of the variable focus on the experiment or the study.
There are three types of variable: independent, dependent, and controlled.