In a developmental psychology class, Trina learned about Baumarind's (1971, 1991) work on parenting styles. She recognized that her parents used an authoritarian style of parenting, as did all her relatives. Because that was the style of parenting she planned to use, she researched the advantages to that style while ignoring any studies that support the use of another parenting style. What kind of bias is Trina falling victim to

Cherry-picking the evidence.

Explanation:

Cherry-picking can be defined as a fallacy of incomplete evidence. In this, a person tends to choose only those evidences that support his/her claims. Evidences that stand contrary to our claims are ignored. It is a fallacy of selective choosing or picking.

In the given case, Trina is being a cherry-picker as she is ignoring the claims of why other parenting styles are useful. Trina recognized the parenting styles that her parents and relatives used and tried to focus on the advantages only of the authoritarian parenting style.

So, Trina is being a cherry-picker of the evidences.

it is due to the halo effect as the impression of the boy created earlier.on the mind of the principle affected his decision