Answer:
C. the hindsight bias
Step-by-step explanation:
the hindsight bias refers to people tendencies to see an situation that they already seen before as predictable. They will assume that the outcome will be pretty much the same as what they've experienced before.
From the excerpt above, we can see that Alexandra and Belinda the research that they read as 'the truth' without even conducting further investigation.
This most likely happened because both of them already has a pre-conceived notion regarding cosmetic surgery.
Alexandra always believe that cosmetic surgery can increase self-esteem while Belinda has always believed that cosmetic surgery cannot increase self-esteem even before they read the research. Both of them only treat the research as a small confirmation for the bias that they already held.