Arefers to sets of opposing or contradictory impulses that create tension between two people.

Dialectical perspective

Explanation:

Dialectical perspective - it is referred to the opposing forces or experience that two people undergo in their relationship. it is perceptive which includes contradiction as a negative force that arouses the feeling of tension in the relationship.

The three important  law of dialectics is

1) law of alteration of quantity into quality  or vice verse

2) law of mutual penetration of opposites

3) law of denying of opposites

i would say b. research typically uses a variety of sources