About Dumbledore 's absolute trust in Severus . And then Tonks lied . She pretended that she herself did n't know the reason why Dumbledore trusted Severus . ' But Dumbledore swore he was on our side ! ' said Tonks urgently , trying to convince herself more than anything .
According to the above context, choose the best option to answer the following question.
Question: Why did Tonk lie to herself about Severus ?
Options:
- Tonks lied to herself because she wanted to be convinced .
 - Tonk lied to herself because she wanted to believed in Dumbledore .
 - Tonks lied to herself because she wanted Severus to be trustworthy .
 - Tonks lied to herself because Dumbledore would have wanted her to .


Tonk lied to herself because she wanted to believed in Dumbledore .