TASK DEFINITION: In this task you are given a sentence. You must judge whether subject of the main clause is singular or plural. Label the instances as "Singular" or "Plural" based on your judgment.
PROBLEM: The only option she had was to get the robe herself.

SOLUTION: Singular

PROBLEM: The ramp would collapse as I drove away, and the rocks might damage the wheels or undercarriage.

SOLUTION: Singular

PROBLEM: After one last, uncomfortable minute, the siblings finally separated.

SOLUTION:
Plural