Fill in the blank (_) in the following sentence from the following choices.
Sentence: Kenneth was considered a negative individual compared to Matthew, due to _ always being pessimistic.

Choice 1: Kenneth was considered a negative individual compared to Matthew, due to Kenneth always being pessimistic.
Choice 2: Kenneth was considered a negative individual compared to Matthew, due to Matthew always being pessimistic.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.