Fill in the blank (_) in the following sentence from the following choices.
Sentence: I want to plant flowers in my garden and decided against roses and chose to plant columbines instead because the _ are harder to grow.

Choice 1: I want to plant flowers in my garden and decided against roses and chose to plant columbines instead because the roses are harder to grow.
Choice 2: I want to plant flowers in my garden and decided against roses and chose to plant columbines instead because the columbines are harder to grow.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
2.