Fill in the blank (_) in the following sentence from the following choices.
Sentence: They went to a petting zoo which Samuel liked but Jason hated. _ was sure the animals enjoyed the experience, too.

Choice 1: They went to a petting zoo which Samuel liked but Jason hated. Samuel was sure the animals enjoyed the experience, too.
Choice 2: They went to a petting zoo which Samuel liked but Jason hated. Jason was sure the animals enjoyed the experience, too.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.