Fill in the blank (_) in the following sentence from the following choices.
Sentence: In order to talk faster, Adam began reading from a script instead of relying on memory. The _ prevented him from talking faster.

Choice 1: In order to talk faster, Adam began reading from a script instead of relying on memory. The script prevented him from talking faster.
Choice 2: In order to talk faster, Adam began reading from a script instead of relying on memory. The memory prevented him from talking faster.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
1. The script prevented him from talking faster.