Context: 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 .

Question: Why did Tonk lie to herself about Severus ?
Options:
0. Tonks lied to herself because she wanted to be convinced .
1. Tonk lied to herself because she wanted to believed in Dumbledore .
2. Tonks lied to herself because she wanted Severus to be trustworthy .
3. Tonks lied to herself because Dumbledore would have wanted her to .
Answer: 1