Fill in the blank (_) in the following sentence from the following choices.
Sentence: Adam is annoyed at Derrick since _ received help from the Airline Gate Agent slower.

Choice 1: Adam is annoyed at Derrick since Adam received help from the Airline Gate Agent slower.
Choice 2: Adam is annoyed at Derrick since Derrick received help from the Airline Gate Agent slower.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
2.