Which situation demonstrates the use of jealousy as a tactic to achieve relational rewards?

A) Toni cheated on Lance,so Lance decided to cheat on Toni.
B) Leif flirts with others because it makes his partner feel uncertain,and boosts his self-esteem.
C) Giles is ignoring his girlfriend because he is upset with her.
D) Dez posts photos on social media of herself with other guys to make everyone think she is popular.

Flirting with others to make one's partner feel uncertain and boost one's self-esteem is an example of using jealousy as a tactic to achieve relational rewards. This behavior is manipulative and can create a power imbalance within the relationship. It can also lead to feelings of insecurity and mistrust, undermining the foundation of the relationship. The other options do not involve using jealousy as a tactic to achieve relational rewards. Toni and Lance's actions are retaliatory and driven by hurt and anger. Giles's behavior is rooted in personal emotions and not a deliberate attempt to manipulate his girlfriend. Dez's actions may stem from a desire to appear popular, but it is not necessarily tied to a specific relationship or relational reward.